#53: The Disappearance of Yingying Zhang

Full Episode Transcript

1.

On a regular morning, the University of Illinois Urbana-Champaign is typically a diverse and vibrant campus, its pathways crowded with students and researchers from all over the globe, including more than five thousand Chinese scholars who travel across the world to pursue their academic dreams. During the summer months, however, a quiet stillness settles over the university's brick buildings and tree-lined streets as the campus population is drastically reduced. Navigating this sprawling campus relies heavily on the Champaign-Urbana Mass Transit District (MTD), a public bus system designed to shuttle students and staff efficiently to laboratories, lectures, and university housing.

To manage this flow safely, MTD enforces a strict, uncompromising protocol: drivers are forbidden from picking up passengers who are on the wrong side of the street. This safety rule was implemented for a very simple, practical reason—to prevent pedestrians from running impulsively into oncoming traffic to chase down a departing vehicle.

On the afternoon of June 9, 2017, the 22 Limited bus was easing along its regular route through campus. As it approached the Mathews Avenue stop, the driver spotted a young Asian female student, waving frantically and attempting to flag the bus down from the other side of the street.

The driver, complying with the safety policy, declined to stop and bypassed the young woman on the pavement.

That split-second decision unknowingly dictated the physical coordinates of a tragedy, altering the lives of two families forever.

2.

Yingying Zhang was born on December 21, 1990, in Nanping, Fujian Province, China, to her parents, Ronggao Zhang and Lifeng Ye. Raised alongside her younger brother, Zhengyang, she grew up in the countryside of southeast China as part of a close-knit, working-class family. Though her parents were poor and had received little formal education, they recognized her remarkable promise early on and pinned their hopes for a brighter future on their daughter. Yingying was her parents' "prize star" and their absolute everything, establishing a warm, deeply affectionate relationship where family members constantly took care of one another. She possessed a beautiful singing voice, played in a local band, and was a vibrant, optimistic presence who was regarded as the glue that held her family together.

Determined to eventually help her parents financially, Yingying became the first member of her family to go to college. She began her university studies in 2009 at Sun Yat-sen University in Guangdong, majoring in environmental science. Her diligence and intellect shone brightly, and she graduated in 2013 at the very top of her class. She then moved to Beijing to pursue a Master of Science in environmental engineering at the prestigious Peking University, completing her degree in 2016.

Following her graduation, she worked as a visiting scholar at the Chinese Academy of Sciences' Institute of Botany. Her academic evolution and deep interest in plant biology naturally guided her toward the specialized field of photosynthesis and crop productivity. Driven by her dream of becoming a university professor and managing her own ecology team, she traveled to the United States in April 2017. She began a post-graduate research appointment within the Department of Natural Resources and Environmental Sciences (NRES) within the College of Agricultural, Consumer, and Environmental Sciences (ACES) at the University of Illinois Urbana-Champaign.

Working in the research group of Dr. Kaiyu Guan, Yingying was dedicated to studying photosynthesis in corn and soybeans. Her work sat at the forefront of agricultural science, aiming to resolve some of global agriculture's most pressing challenges: achieving co-sustainability between environmental quality and food security. To address these issues, her lab was pioneering the use of Sun-Induced Chlorophyll Fluorescence (SIF)—a faint red byproduct of light energy emitted during photosynthesis—as a real-time proxy to monitor crop photosynthetic activity and stress from space. Yingying’s research was intended to help farmers monitor crop conditions and manage nitrogen fertilizer application, ensuring crops met their nutritional needs while preventing excess fertilizer from leaching into water systems.

Yingying's appointment also included assisting with field-based research in Nebraska, a state whose heavily irrigated fields provided a crucial contrast to rain-fed Illinois. This research was designed to understand how irrigation provides "cooling benefits" to crops, protecting them from heat and drought stress under changing climate conditions. She carried with her not only these high-level research ambitions but also a personal commitment to return home to China that autumn to marry her longtime fiancé, Xiaolin Hou.

—

Yingying Zhang arrived at the University of Illinois Urbana-Champaign in late April 2017 to begin a one-year post-graduate research appointment as a visiting scholar. As a first-time traveller outside of her home country, she entered this vast campus carrying immense academic promise. Settling into her new environment, she was assigned student housing at Orchard Downs, a university-owned apartment complex situated on the southeast end of campus. Her living arrangements reflected the transitional, orderly life of a young scholar finding her footing; her second-story apartment was kept carefuly organised. In her living room sat an unassembled bicycle she hoped to use to navigate her new surroundings, and a private diary where she recorded her thoughts.

Without a car of her own, Yingying’s day-to-day routine revolved around learning to navigate the summer transit schedule of the Champaign-Urbana Mass Transit District. Every morning, she would make her way to her assigned cubicle at Turner Hall. Working under the guidance of Dr. Kaiyu Guan, she hoped to perform exceptionally well during her appointment, gain admission into the university's highly competitive doctoral program, and eventually return to China to teach and manage her own ecology team. Despite her busy research hours and a grueling 13-hour time difference, Yingying remained deeply connected to her loved ones, routinely calling her fiancé almost every day.

Behind her steady academic focus, however, she carried the silent emotional weight of her transition. In her personal diary, Yingying articulated a poignant mix of optimism and uneasiness upon first touching down in America. She described herself as a "fish out of water"—deeply determined to succeed but feeling stymied by the vast cultural distance and her separation from her family. She also observed that the casual, ubiquitous kindness of strangers she was accustomed to back home was a rarity in this foreign land. Yet, she pushed past these quiet anxieties, anchoring her journey in a powerful personal philosophy in an entry of her journal: "Life is too short to be ordinary".

To those working alongside her, Yingying was perceived as a uniquely positive, optimistic, diligent, and brave scholar. Her friends and family knew her as a caring, fun-loving, and "soulful girl" who was exceptionally thoughtful and never wanted to cause others to worry.

As the afternoon of June 9, 2017, wore on, the quiet crop research laboratories in Turner Hall began to feel unusually incomplete. Yingying was a remarkably diligent scholar and not the kind of student who simply vanished without a word, so when her workspace remained vacant past her lunch break and repeated phone calls went straight to voicemail, a creeping sense of unease began to settle over those who worked with her.

Earlier that Friday, Yingying's routine had started with her typical academic focus. At 8:30 a.m., she arrived at her laboratory in Turner Hall, immersing herself in her post-graduate research. Around midday, she paused her work, returning to her second-story apartment at the university's Orchard Downs housing complex between for a quick lunch. After lunch, she prepared for an important off-campus errand. Yingying lived modestly, determined to save money to help her working-class parents back in China. To reduce her expenses, she had successfully applied for a cheaper rental at the One North apartment complex on the northern edge of campus and had scheduled an afternoon appointment to meet with the marketing manager to sign her new lease.

At 1:35 p.m., she boarded an MTD Teal line bus at the Orchard Downs South Shelter. Realizing she was running behind, Yingying sent a text message to the leasing agent, Rontrez Stone, politely letting him know she was running about ten minutes late and expected to meet him at approximately 2:10 p.m.. She exited her first bus at West Springfield and North Mathews avenues to make her transfer. As she stood at the Mathews Avenue stop, she spotted the oncoming 22 Limited bus and tried to flag it down. However, because she was on the wrong side of the street the driver could not stop. Bypassed by the bus, she walked north on Goodwin Avenue toward a transit stop at West Clark Street.

At 2:38 p.m., having waited in vain for Yingying to arrive at the leasing office, the manager sent her a follow-up text message. No response was received. On the other side of the globe, her fiancé and her parents were accustomed to their daily phone calls. Due to the thirteen-hour time difference, they would soon be waking up to a silence that grew heavier with every passing hour. Back in Urbana, as the sun set and the research halls emptied, her colleagues' initial confusion hardened into alarm as her phone continued to ring out into empty voicemails.

—

That evening, Dr. Kaiyu Guan and several concerned colleagues arrived at the police station to report 26-year-old visiting scholar Yingying Zhang missing. The report was taken by Officer Ezzard Charles Hoskins Jr., a twelve-year veteran of the patrol division and a former U.S. Marine medic, who immediately recognized that her sudden absence was highly uncharacteristic of a dedicated and reliable student.

Officer Hoskins’ immediate actions were swift. He secured Yingying’s physical description and obtained her official university identification photograph from the campus "I-card" database to distribute to search teams. The initial, hopeful theories of investigators were that she might have boarded the wrong bus, got lost in the unfamiliar terrain of her new city, or suffered a medical emergency. Armed with her photograph, Hoskins spent the night canvassing major campus hubs, including the Illini Union and popular local student hangouts like CoCo Creme and Cafe Bene, asking students and staff if anyone recognized her. He also checked the downtown Illinois Terminal transit center, interviewing security guards, ticket agents, and travelers. Throughout these early hours, Hoskins continually tried calling Yingying’s phone, only to hear it ring out and slip repeatedly into voicemail.

As midnight approached, the investigation shifted directly to her living arrangements. Hoskins drove to her second-story campus apartment, knocking on the door and leaving his business card in the frame in case she returned. He then drove miles north to search the welcome center of the One North apartments—where she had been scheduled to sign her lease—but the leasing staff and security had no record of her arrival. Realizing that she had vanished somewhere along her transit route, Hoskins returned to Orchard Downs, where Dr. Guan and several of Yingying's colleagues were waiting in the dark. With the assistance of housing staff, Hoskins and Officer Sanders unlocked and entered her apartment to check for any sign of her.

Inside the quiet apartment, the officers found an orderly, lived-in space that strongly suggested she had expected to return shortly. Her bed covers were slightly pulled back and her personal effects and currency sat untouched on her dresser. The officers carefully left the residence undisturbed, secured the door, and Hoskins requested that her details be broadcast to surrounding police departments via a regional police warning message. The urgency of her disappearance was confirmed on the morning of June 10, when Hoskins returned at 7:00 a.m. to find his business card still wedged untouched in the door frame. When he checked a second time at 5:30 p.m. that evening with Officer Lewis, the apartment remained exactly as it had been left, confirming that she had not returned.

3.

Meanwhile, the agonizing news was transmitted half a world away to her hometown of Nanping in Fujian Province, China. Upon hearing that her daughter had vanished in a foreign country, Yingying's mother, Lifeng Ye, suffered an overwhelming collapse and fainted, entering a state of profound shock that left her unable to sleep, eat, or work. Her longtime fiancé, Xiaolin Hou, who had planned to marry her that coming October, was contacted in Beijing by one of her colleagues. Plagued by immediate panic, Hou knew that Yingying was an exceptionally thoughtful and dutiful daughter who would never let her family worry; her total silence could only mean she had met with severe difficulty. He desperately dialed her number again and again, pleading for a connection that never came.

Refusing to remain passive, her father, Ronggao Zhang, alongside Xiaolin Hou and a paternal aunt, began making urgent, desperate preparations to fly to the United States to aid in the search.

Back on the campus, the University of Illinois Police Department (UIPD) intensified its efforts on Saturday, June 10. Officer Tara Hurless began reviewing mass transit security footage, successfully identifying video showing Yingying boarding the Teal line bus at the Orchard Downs South Shelter and traveling to the intersection of Springfield and Mathews Avenues, where she exited to transfer. While this established her early path, her ultimate fate remained a mystery as subsequent physical searches of campus hubs, local restaurants, and transit terminals yielded no further sign of her.

The critical breakthrough that shifted the entire course of the investigation came early on the morning of Monday, June 12. Telecommunication Officer Kenny Costa of the university police was studying campus security feeds when he discovered a haunting sequence captured at the corner of North Goodwin Avenue and West Clark Street. The video showed a black car passing Yingying at 2:00 p.m., circling the block, and stopping next to her at 2:03 p.m.. After speaking with the driver for approximately one minute through the passenger window, Yingying climbed into the front seat before the car drove northbound.

With clear visual evidence that Yingying had been lured into a passenger vehicle, the Federal Bureau of Investigation formally entered the case, treating her disappearance as a potential federal kidnapping. The FBI immediately partnered with university and state police to coordinate an intensive round-the-clock investigation. While the resolution of the surveillance feeds was too low to discern the vehicle's license plate number, investigators managed to identify the car as a black Saturn Astra. A thorough database search of county vehicle records revealed that this was a highly uncommon model in the area, having only been produced for a couple of years. In fact, there were only twenty-six Saturn Astras registered in Champaign County, and out of those, only eighteen were four-door hatchbacks matching the vehicle in the video.

Armed with this narrow list of owners, FBI agents Michael Carter and Joel Smith began canvassing the area to interview every Astra owner. Upon arriving at the Champaign apartment of registered owner Brendt Allen Christensen, the agents found him seemingly calm and cooperative, admitting he knew his vehicle looked like the one on the news. When questioned about his whereabouts between 2:00 and 3:00 p.m. on the afternoon of Friday, June 9, Christensen checked his phone and claimed that because he had received a text from his girlfriend, Terra Bullis, at 1:00 p.m. but had not responded until 4:00 p.m., he must have been asleep or playing video games at home. He consented to a brief look around his apartment and his car, and since the agents found no obvious evidence of a crime at that initial glance, they departed to interview other Astra owners.

Yet, the microscopic examination of the campus surveillance footage continued over the next forty-eight hours. On Wednesday, June 14, University Police Department Officer James Carter noticed a critical detail: the suspect car had a sunroof, and there was a distinct, irregular blemish or missing section on the plastic hubcap of the front passenger-side tire. Agent Joel Smith recalled seeing these exact features on Christensen's car, and at 5:50 p.m. that evening, he and Agent Katherine Tenaglia returned to Christensen's apartment to verify the match.

Upon confirming that the sunroof and the front passenger hubcap defect precisely matched, the FBI secured a federal search warrant to seize the vehicle. Just before midnight on June 14, a tactical team of seven FBI agents and university police officers descended on Christensen's apartment, waking him and his wife. While agents secured the vehicle, Christensen agreed to accompany Special Agent Anthony Manganaro and Detective Eric Stiverson to the nearby FBI office for formal interrogation.

At the station, Christensen initially clung to his original alibi, repeating and expanding his claim that he had been playing video games in his apartment literally all day on June 9. However, when Detective Stiverson broke his composure by stating flatly that investigators knew he had picked up Yingying, Christensen's demeanor dramatically shattered; he paused, began breathing heavily, and his hands shook. Realizing his story had failed, he claimed he must have mixed up Friday and Saturday, admitting for the first time that he did pick up a lost, distressed Asian woman who spoke broken English. He claimed he offered her a ride because she was running late for an appointment, but that after he made a wrong turn, she panicked and he let her out of his car in a residential area a few blocks away. After sticking to this story under further questioning, Christensen refused to speak further, invoked his right to silence, and requested an attorney.

Back at his apartment, his wife Michelle signed a written consent to search, allowing agents to seize his computers and personal cellphone.

—

Brendt Allen Christensen was born in 1989 in Stevens Point, Wisconsin, where he was raised in a middle-class household by his parents, Mike and Ellen Christensen, alongside an older brother and a younger sister. To those who knew him during his early years, he seemed to be a typical, promising Midwestern boy; he participated in the Boy Scouts, played youth football, and gave no outward indication of the severe psychological issues that would later define his adult life. He graduated from high school in Stevens Point and enrolled at the University of Wisconsin-Madison. There, he proved to be a highly intelligent and focused student, eventually graduating in 2013 with a double major in mathematics and physics. During his college years, he was perceived by classmates and peers as a thoroughly normal, very calm, and academically gifted young man.

While still a student in Wisconsin, Christensen met Michelle Zortman, whom he married in 2011. The couple built a quiet, deeply insular life centered almost entirely on one another, maintaining few childhood friends and remaining distant from their families. In 2013, Christensen's academic achievements culminated in his admission to the prestigious physics doctoral program at the University of Illinois Urbana-Champaign. Following his acceptance, the young couple relocated to Champaign-Urbana, renting an apartment at the Stonegate Village complex. Michelle found employment as a loan officer at a local bank while Christensen worked as a graduate teaching assistant. For his first three semesters, Christensen thrived, earning excellent grades and performing his academic duties without raising any flags among faculty or students. To his advisors and classmates, he was simply a bright, promising scholar navigating the rigorous demands of an elite scientific track.

Beneath this stable veneer, however, Christensen was fighting a silent, escalating battle with long-standing mental health struggles, including night terrors, sleepwalking, and debilitating migraines. By his fourth semester in graduate school, his mental health began a severe downward spiral, exacerbated by heavy substance abuse. By 2016, his academic focus had completely disintegrated. In the summer of 2016, under the advice of academic mentors, he ceased his doctoral studies and transitioned to a terminal master's program. The absolute collapse of his academic career occurred in the fall of 2016 when Christensen, once a straight-A student, failed every single graduate class, receiving straight Fs and marking the final, tragic derailment of his scientific ambitions.

This catastrophic failure was fueled by a severe, spiraling dependency on alcohol, which Christensen chronically abused by mixing it with prescription antidepressants and sleep aids, becoming increasingly dysfunctional and spending days isolated in his apartment.

Beneath the surface of this functional collapse lay an escalating, highly disturbing psychological deterioration. His cognitive habits had shifted toward the macabre, developing a deep obsession with serial killers, particularly Ted Bundy, and the dual existence of characters in the novel American Psycho. On February 6, 2017, using a university computer, Christensen downloaded an academic research paper titled "A Critical Analysis of Research Related to the Criminal Mind of Serial Killers". Less than three weeks later, on February 25, his digital trail grew even darker when he downloaded an online research publication regarding human biological decomposition.

This downward psychological spiral severely fractured his marriage to Michelle Zortman. The couple had lived a deeply insular, isolated life in Champaign-Urbana; they had no local friends, did not keep in touch with childhood acquaintances, and remained emotionally distant from their families. Michelle had already grown increasingly leery of her husband after a night in December 2016 when Christensen, heavily intoxicated, made frightening disclosures about his dark fantasies. By early 2017, Zortman felt their marriage had reached a dead end due to his chronic depression and explosive drinking, eventually presenting him with an ultimatum, stating that she wanted a divorce.

Devastated by the prospect of losing the only person he relied on for social-emotional support, Christensen desperately sought a compromise to preserve the union. This desperation culminated in Zortman opting to open their marriage as a temporary alternative to an immediate divorce, allowing both partners to date other people. Under this arrangement, Michelle began dating a co-worker, Ryan Vela, a development that left Christensen feeling discarded and completely devastated as he watched his wife build a relationship with another man. Left alone in their shared apartment to play video games in isolation, Christensen confessed to feeling like a total failure in every aspect of his life.

4.

On March 21, 2017, Brendt Allen Christensen voluntarily walked into the University of Illinois Counseling Center (UICC) in a state of profound personal and academic collapse. This spiralling mental state prompted him to finally seek clinical assistance.

The written intake paperwork Christensen completed during this initial visit painted a deeply alarming portrait of his psychological instability. His self-reported clinical history revealed that he was currently taking prescribed medication for depression and sleep, had been hospitalised for mental health concerns two to three times in the past, had intentionally self-injured within the last year, and had seriously considered suicide two to three times, including within the preceding month.

This acute distress was mathematically quantified by the center's Counseling Center Assessment of Psychological Symptoms (CCAPS) 62 Profile Report. Christensen’s scores reached close to or at the 100th percentile on scales measuring depression, generalised anxiety, family distress, substance abuse, and the overall distress index. He affirmed the highest possible severity for symptoms of alcohol abuse and indicated that he felt disconnected from himself, felt isolated and alone, suffered from spells of terror or panic, experienced recurring nightmares or flashbacks, lost touch with reality, felt helpless, and experienced intense sadness or anger regarding his family.

During this same visit, Christensen consented to a videotaped training interview with a doctoral student intern, Carin Molenaar. In front of the camera, he corroborated the severe symptoms from his written assessment. He openly admitted that he had developed an obsession with serial killers and confessed to chronically abusing the depression medication prescribed by his psychiatrist at the university's McKinley Health Center. Most critically, he disclosed that his homicidal thoughts became increasingly intense and analytical whenever he consumed alcohol.

As the interview progressed, Molenaar questioned him directly about his written admissions of wanting to hurt other people. Christensen made the chilling confession that he had actually gone "pretty far down the path" of thinking about abducting and killing someone. He admitted that he had not merely fantasised, but had actively formulated plans that were "pretty far" along. Pressed on whether he had identified a specific individual to target, he responded, "Not really; but types of people, yes". Yet, immediately after laying bare these dark, premeditated coordinates, Christensen attempted to distance himself from his homicidal impulses, stating, "I know how this makes me look. I want to get help. I'm not that kind of person".

Nine days later, he returned to the University of Illinois Counseling Center for a series of appointments. He first sat down with Jennifer Maupin, a master social worker and drug and alcohol counselor, to undergo an Alcohol and Other Drugs Assessment. Although he expressed a willingness to continue evaluating his potential risk of harm to himself or others, the depth of his psychological instability prompted Maupin to immediately refer him to Tom Miebach, a licensed clinical social worker and crisis triage case manager, for a more specialized evaluation that very same afternoon.

It was during this subsequent session with Miebach that Christensen made his most chilling disclosures. He admitted that he found himself frequently thinking about murder, conceptualizing his thoughts in an "analytical fashion" that focused on how to kill a person and successfully get away with it. More alarmingly, he confessed that he had already purchased specific physical items intended for the transport and disposal of a human body, though he claimed he had since disposed of or returned them. When Miebach pressed him to identify what those items were, Christensen refused to specify. He repeatedly denied having any active, immediate plan to harm a specific individual, asserting that he did not want to hurt anyone and did not want to go to prison. Miebach ultimately scheduled a follow-up appointment for early April to check on his progress, but Christensen never showed up.

The institutional decisions made by the university staff in response to these sessions would subsequently ignite a fierce legal and ethical controversy. On March 31, the day after his appointments, Maupin sent Christensen an email recommending that he seek ongoing care at the external Rosecrance Treatment Center in Champaign. Because the university clinic was structured strictly for short-term counseling, she described Rosecrance's comprehensive clinical menu as ideal for "one-stop shopping". However, the Counseling Center did not initiate its Campus Violence Threat Policy or file a mandatory suicide incident report, operating under the premise that because Christensen had sought help voluntarily and denied any targeted intent to harm others, he did not meet the criteria for emergency escalation.

—

When federal investigators homed in on Brendt Christensen in the Yingying Zhang disappearance case, a critical phase of the investigation began with the extraction and analysis of his digital footprint following his initial interrogation on June 15, 2017 when FBI agents seized Christensen’s personal cellphone and computers. Because he had used a Virtual Private Network (or VPN) and other methods to shield his online footprint, the FBI obtained a formal federal search warrant to perform a deep forensic examination of his mobile phone. This careful digital excavation was led by FBI Senior Forensic Examiner William O’Sullivan, who constructed a highly detailed timeline of Christensen’s online queries, text messages, deleted data, and hidden system files.

What O’Sullivan and his fellow agents pulled from the silent depths of Christensen’s devices was a terrifying, step-by-step record of a premeditated obsession. In addition to his interest in serial killers and the biology of human decomposition corroborated by the papers he downloaded on the subjects in February 2017, by April his focus had transitioned to active preparation. On April 11, under the alias "Akuma689," Christensen created an account on FetLife.com, a popular sexual fetish website, and subsequently texted his girlfriend, Terra Bullis, to share his new handle.

As examiners mapped his browsing history on the site, they found he had actively frequented threads and forums dedicated to non-consensual containment, including "Abduction play," "Abduction 101," "perfect abduction fantasy," "planning a kidnapping," "Consensual Nonconsent Blackmail and Slavery," and "Tools of the Kidnapper". His search history painted a picture of a man preparing for a crime, showing queries for "serial killer dogs slave instructions" alongside searches for "knife sharpening" and "champaign knife sharpening". Most damningly, inside a hidden system directory on his desktop computer, forensic analysts recovered high-resolution images of bound, gagged, and abused women chained to bedframes and handcuffed to PVC pipes.

Even after the disappearance on June 9, the digital logs tracked his frantic attempts to monitor the investigation and cover his tracks. Christensen searched Google for "Sodium Hypochlorite" and researched "iPhone tracking", desperate to know if the victim's phone could be monitored. On June 13, he attempted to scrub his digital trail by clearing his entire Google Chrome web browser history, but his devices continued to record his intense obsession with the case. In the days following the missing report, Christensen's phone and laptop logged regular visits to local news sites, Reddit threads discussing the missing scholar, White House petitions, and FBI kidnapping posters.

For investigators, the forensic analysis of these electronics shattered any claim that the crime was a sudden, alcohol-fueled impulse.

On June 15, as federal and local investigators began tightening the net around their prime suspect, they executed a federal search warrant to seize Brendt Christensen’s black Saturn Astra. The car, which had been identified on campus surveillance footage by its distinct cracked front passenger hubcap and sunroof, was immediately towed to a secure bay at the Champaign Police Department for preliminary processing. Three days later, on June 18, it was transported to the main office of the FBI Springfield Division in Springfield, Illinois, for a more exhaustive forensic inspection.

During their forensic processing, investigators noted a highly suspicious detail: the front passenger door of the vehicle had been cleaned to a significantly more diligent extent than any of the other doors. To experienced detectives, this sharp discrepancy was a clear indicator of an active effort to conceal or destroy physical evidence. During his midnight interrogation on June 15, Christensen attempted to explain away any potential forensic traces by claiming that he had given his car a thorough cleaning after investigators first questioned him on June 12, during which he allegedly nicked his finger and left some of his own blood in the car. However, the subsequent forensic examination by the FBI uncovered no trace of blood or DNA inside the vehicle, letting his claims of bleeding inside the car fall flat and confirming that Christensen had gone to great lengths to thoroughly sanitise his mobile crime scene.

While Christensen's domestic life with his wife Michelle Zortman was fracturing in early 2017, he sought connection elsewhere, culminating in a fateful digital encounter with a local woman named Terra Bullis. The two first met on the online dating platform OK Cupid in April 2017, after Bullis responded to his profile on April 2. Their initial date at a local bookstore café was later described by Bullis as "whimsical." As they began dating, they navigated a complex, polyamorous arrangement; Christensen was in an open marriage, while Bullis was simultaneously dating other men. Within weeks, their relationship developed a highly distinct dynamic as Bullis introduced Christensen to the BDSM community, embarking on an intimate bondage affair in which Christensen acted as the "dominant" and Bullis was the "submissive". Despite the roleplay, the relationship was heavily strained by Christensen's escalating personal crises; his academic collapse, chronic depression, and severe alcohol dependency cast a dark shadow over their time together.

In Terra's eyes, Christensen was initially an attractive, highly intelligent, and calm partner. She quickly became emotionally attached to him, yet her feelings grew increasingly conflicted as she witnessed his severe psychological decline and his drinking spiral out of control. Her attachment was severely tested in May 2017, when Christensen's messages to her began to reflect a deeply disturbing desire for infamy and notoriety. In a disturbing text sent on May 30, he wrote that fading into nothingness was unacceptable, stating that he would "rather destroy humanity" than let himself be forgotten. Bullis found herself deeply unsettled by these dark ruminations, noting that Christensen would discuss his belief that he could commit a murder and successfully get away with it in a calm, almost excited manner. She remained emotionally bound to the man she had grown to care for, yet increasingly terrified by the cold, analytical nature of his dark fantasies.

By June 16, with Zhang still missing and Christensen having invoked his right to counsel during his first formal interrogation, the FBI launched a continuous, 24-hour physical surveillance operation to monitor his every movement. Realising they needed inside access to break his silence, investigators made a critical, high-stakes move. They approached Terra Bullis, presenting her with the reality of Zhang's disappearance and their suspicions regarding her boyfriend. Caught in an agonising position of intense personal conflict, Bullis agreed to cooperate with the FBI. Driven by the hope that the recordings would either completely exonerate the man she loved or help bring a missing girl home, she consented to wear a concealed recording device to wiretap their private conversations, setting into motion a dramatic undercover operation.

5.

On June 17, 2017, Yingying Zhang’s father, Ronggao Zhang, alongside a paternal aunt and her fiancé, Xiaolin Hou, arrived in Champaign to confer with federal and local authorities and directly join the search efforts. Having traveled thousands of miles from China into an unfamiliar Midwestern town, the family was thrown into an endless nightmare of grief and uncertainty. Xiaolin Hou would later recall the sheer, heavy toll of those early weeks, wondering how they managed to survive the initial shock of her disappearance. To bolster their efforts, on June 19, the University of Illinois and Champaign County Crime Stoppers announced a reward of $40,000 for any information leading to the arrest of those responsible for the kidnapping. This reward was a historic milestone, representing the largest reward ever offered in the 31-year history of the Champaign Crime Stoppers organization. As the weeks wore on without answers, the family vowed not to leave the United States until Yingying was found, prompting authorities to increase the reward to $50,000 on July 14.

The disappearance of Yingying Zhang sent profound shockwaves through the international academic community, reverberating far beyond the campus of the University of Illinois Urbana-Champaign and deeply impacting Chinese student populations across the United States. At the time of her disappearance, UIUC hosted one of the largest Chinese student enrollments in the nation, with more than five thousand Chinese undergraduate and graduate students. For these scholars and their families in China, the tragedy was not merely a localized crime; it shattered the long-held perception of the United States as a safe promised land for academic pursuit. The senseless attack on an outstanding visiting scholar fueled severe, widespread anxieties among Chinese families, prompting parents to deeply question the safety of sending their children to study in America. This intense anxiety and grief were reflected in the unprecedented media coverage from Chinese outlets, which consistently outnumbered English-language reporters at the federal courthouse, keeping millions of citizens in China glued to live updates of the trial.

This collective unease catalyzed a massive mobilization of the local community. Teams of worried students, faculty, and local residents tirelessly scoured local parks, abandoned houses, and campus pathways in a desperate attempt to find any trace of her.

This domestic anxiety quickly elevated the case into a matter of high-stakes international attention and close governmental monitoring by the People's Republic of China. The Chinese government actively intervened to support the family and protect its citizens, with Hong Lei, the Chinese Consul General in Chicago, personally visiting the Zhang family to offer sympathy and formally urging the United States judicial system to hold a swift, fair trial and mete out the harshest possible punishment. Consul General Hong Lei emphasized that both nations shared a vital "common security interest" in protecting international students, noting that Chinese families were watching closely to understand how such a horrific crime could be committed against an elite student.

As the search yielded no immediate results, the mood on campus grew increasingly somber, marked by a tense, waiting silence.

At 5:25 p.m. on the afternoon of Thursday, June 22, 2017, Terra Bullis initiated a high-stakes phase of the federal investigation. Preparing for her boyfriend Brendt Christensen’s arrival at her residence, she activated her concealed, body-worn FBI recording transmitter.

To establish a clear, documented timestamp for the monitoring federal agents, she spoke directly and quietly into the hidden microphone, stating:

"This is Terra. It's Thursday the 22nd at 5:25 and he should be coming over around 5:30 so I'm turning it on."

Almost exactly as she had anticipated, there was a brief break in the audio, and Christensen arrived at approximately 5:30 p.m.

The early minutes of the recording captured a seemingly mundane domestic scene, but the undercurrent of psychological tension was immediate. When Bullis asked Christensen what he was looking at, he calmly answered that he was browsing Reddit, explaining that scrolling through the online forum was simply a way to keep his fidgeting hands and mind occupied when he had nothing else to do. As the conversation turned toward personal habits, both admitted to struggling with severe alcohol dependency. Bullis expressed deep concern that she had been "really bad with alcohol lately," a sentiment Christensen quietly echoed. He admitted that his wife, Michelle, was strongly opposed to his drinking, viewing it as a "slippery slope." Though Christensen agreed with his wife's assessment, he defiantly told Bullis that he was likely going to ignore her warnings, admitting that his urge to drink was driven by a desperate need for a "slippery slope" escape. He confessed that if he began "self-medicating" with alcohol, his drinking would quickly spiral out of control, slowing his mental faculties—a risk he felt he had to mitigate because he was currently looking for a job and could not afford to be physically inept or break the law by abusing illegal substances like marijuana.

The psychological climax of the June 22 wire record occurred when Christensen, battling escalating paranoia, explicitly discussed the federal dragnet closing in around him. "I still think they're monitoring me," Christensen confessed to Bullis, stating flatly that it was a "safe assumption" to believe his entire apartment was wiretapped. He proceeded to describe the intense physical surveillance he had endured over the preceding days, recounting how federal agents had continuously tailed him for four to five days and parked surveillance vehicles on both sides of his apartment complex.

Christensen went on to tell Bullis that he wouldn't be surprised if investigators had also installed spyware or tracking software on his electronic devices once they were eventually returned. To explain his digital defenses, Christensen described his extensive use of a VPN on his computer and his decision to disable location tracking on his cellphone, claiming these were strictly legal precautions to protect his personal privacy from internet history buyers rather than attempts to conceal criminal behavior.

In a chilling attempt to reassure Bullis and maintain his double life, Christensen casually lied about his standing in the investigation, asserting that the intense surveillance had finally stopped because the authorities had cleared him. "They know it wasn't me," Christensen insisted, claiming that his daily routine under their watch consisted of nothing more than occasionally walking down to the kitchen and utilizing the bathroom. For FBI investigators, this first recorded wire was a major breakthrough. While Christensen did not yet confess, his recorded statements laid bare his severe psychological decline, technical evasions and deep paranoia.

—

Following her family's arrival in Champaign and the subsequent intensification of search efforts, a powerful sense of collective determination began to take hold across the University of Illinois campus. Refusing to let Yingying's story slip from the public eye, her longtime fiancé, Xiaolin Hou, worked in close coordination with the university's Chinese Students Association to create a major public event. Their collaboration sought to channel the campus's deep anxiety into a constructive, highly visible demonstration of solidarity. In planning the event, they designed a two-part gathering that would serve as both a physical march through the campus and a reflective space of artistic tribute, ensuring her presence remained central to the university's daily life.

The preparatory work for the event was carried out by distraught Chinese student groups and university faculty, who actively organized search parties and pooled resources to produce outreach materials. To support the mobilization, these volunteers printed numerous flyers and informational posters featuring Yingying's photograph, her physical description, and details of the Crime Stoppers reward. These printed materials were distributed widely throughout local businesses, campus buildings, and residential areas. Well-wishers also continuously adorned the campus bus stop where she was last seen with fresh flowers, hand-written notes, and symbolic items, transforming the physical coordinate of her abduction into an active, community-driven site of remembrance.

On the day of the event, the planned walk drew between one and two hundred students, faculty members, and local community residents. The procession commenced at the campus's Cranden Center, with the crowd walking solemnly and in silence through the university streets. They marched directly to the bus stop located at the corner of North Goodwin Avenue and West Clark Street—positioned directly in front of the university's PBS radio and television station, WILL—to mark the exact coordinate where Yingying had been lured into the suspect's vehicle. After pausing at the stop to pay tribute, the crowd returned to the Cranden Center. Once back inside, the group transitioned into the second phase of the evening, assembling for a supportive memorial concert. This musical gathering featured songs meant to celebrate her life, her love of singing, and her dreams of one day returning to China as an agricultural professor.

The core intentions of the memorial walk and concert were deeply functional as well as emotional. Strategically, the organizers aimed to sustain intense news media interest, raise crucial search funds to assist the family's ongoing living expenses in the United States, and encourage anyone who might have witnessed anything unusual on the afternoon of her disappearance to come forward and contact law enforcement. Above all, it held the intention to publicly show that the university community stood side-by-side with her distraught father, aunt, and fiancé, refusing to let her fade into obscurity while she was still considered missing. This massive public event and demonstration of community solidarity took place on Thursday, June 29, 2017, marking exactly twenty days since Yingying Zhang had vanished from the campus.

Brendt Christensen had been obsessively tracking the national and international news coverage of the case online and made the calculated decision to attend the event himself. Driven by a dark, self-absorbed hubris, he ordered his submissive girlfriend, Terra Bullis, to accompany him to the campus vigil.

As the couple walked among the crowd of hundreds of students, faculty, and local residents who had gathered to search for answers, the physical atmosphere was thick with tension. Christensen had been drinking heavily throughout the afternoon and evening, sharing a bottle of rum and water with Bullis to the point that his speech was heavily slurred and intoxicated. Yet, as he watched the massive crowd marching in grief from the campus Cranden Center to the bus stop where Yingying was last seen, Christensen’s mind was gripped by a chilling sense of dark satisfaction. Leaning close to Bullis, he marveled at the scale of the gathering, whispering: "I just want to see how many people were here. They are here for me".

—bullis’ audio—

Throughout the walk, Bullis had to maintain her submissive persona to avoid raising his suspicion, keeping her emotions in check to coax him into speaking freely. Beneath this facade, she was gripped by profound terror; her heart was racing so violently that the rapid thumping of her chest was physically captured on the FBI's audio feed. Her fear intensified as Christensen began pointing out "ideal victims" in the crowd, detailing the physical and anatomical characteristics he looked for in a target.

To ensure his graphic boasts remained hidden from any physical wiretaps he suspected might be monitoring them, Christensen grabbed Bullis' phone while they were at the vigil. He pulled up the note-taking function and silently typed out a series of four statements, deleting each individual line as soon as he had shown it to her: "It was me." "She was number 13." "She is gone." "Forever."

6.

When Terra Bullis asked Brendt Christensen about what had happened to Yingying, he erupted into a casually cruel and graphically detailed narrative of the crime. He described how he posed as an undercover officer to lure her into his car, taking advantage of her panic and her limited English before taking her back to his apartment. In his bedroom, he raped and tortured her, but grew "bored" during the twenty-minute assault, lamenting that "there was nothing to her" and that he "didn't orgasm". But what seemed to shock and fascinate Christensen most was Yingying's sheer, desperate determination to survive. He called her "valiant" and "resilient," telling Bullis that she was "stronger than any of the other victims I ever had". He described choking her for approximately ten minutes, but she refused to die. He then dragged her into his bathtub and struck her in the head as hard as he could with a metallic baseball bat, splitting her skull open.

Even after her skull was fractured, Christensen marveled that her strength was "supernatural" because she was still breathing. He grabbed a knife and stabbed her in the neck, yet she still fought back, desperately grabbing at the blade with her bare hands. To finally end her life, Christensen admitted he had to cut her head off. Bullis listened to these graphic, unspeakable details in silence, keeping her reactions suppressed as Christensen laughed about the decapitation. He bragged that her remains would never be found, mocking her family who had traveled thousands of miles from China only to "leave empty-handed".

Bullis continuously pushed for further details, asking Christensen if she was in any danger herself. Christensen assured her she was safe, claiming he would never hurt her. But Bullis, seeking to highlight his threat and secure a binding admission, replied, "Unless I'm a complete idiot and say something to someone, then I'm not safe". Christensen did not hesitate, answering with a cold, terrifying finality: "That's true".

The net constructed by federal investigators tightened irreversibly on the morning of Friday, June 30, 2017, when FBI agents arrested Brendt Allen Christensen on his twenty-eight birthday. He was formally taken into custody pursuant to a federal criminal complaint charging him with the kidnapping of Chinese visiting scholar Yingying Zhang. Christensen’s arrest came less than twelve hours after he had walked through the solemn crowds of a campus memorial vigil, boasting to his wiretapped girlfriend about his gruesome deeds. With the suspect safely detained, federal and state law enforcement immediately transitioned their focus to securing the physical coordinates of his crime, executing a comprehensive, federal search warrant at his Springfield Avenue apartment.

To guide the initial sweep of the residence, the Springfield Evidence Response Team called upon McHenry County Sheriff's Deputy Jeremy Bruketta and his certified cadaver-detecting canine, Sage. Sage was brought into the apartment to locate any invisible biological traces of decomposition. When led into the bathroom—the space where Christensen had graphically described murdering Yingying just hours before—the dog alerted positive for the scent of a deceased human body near the bathroom door and sink. This vital canine alert directed the forensic teams to focus their search on his domestic spaces.

During the primary search on June 30, the Springfield Response Team carefully processed the apartment and seized a collection of highly incriminating evidence. They also secured a roll of duct tape, a drain trap dismantled from the plumbing underneath his bathtub, and the two mattresses from his master bedroom. These mattresses, which had previously been noted by crime scene investigators on June 15 as possessing three distinct reddish stains, were now seized for exhaustive laboratory analysis.

The search grew even more forensic on July 1, when the FBI's Chicago Emergency Response Team assumed control of the scene and deployed an alternative light source—essentially a highly specialized blacklight—to examine the apartment's surfaces. The light illuminated invisible handprints and swabbing patterns across the bedroom drywall and carpet, revealing that someone had engaged in an intense, localized effort to scrub and sanitize the crime scene. Moving the bed, Special Agents Doug Seccombe and Courtney Corbett pulled up the bedroom carpet. Beneath the surface, they uncovered a massive, dark reddish bloodstain that had seeped completely through the carpet’s primary fibers. The stain covered the underside of the carpet, saturated the foam padding, and ran along the wooden carpet tack strip, the baseboard, and onto the drywall behind the headboard.

These critical physical findings were immediately packaged and flown to the FBI Laboratory in Quantico, Virginia. There, forensic biologist Amanda Bakker performed high-resolution nuclear DNA testing on the recovered material. Bakker successfully identified Yingying Zhang's DNA across all of these items, concluding that the profile found on the underside of the carpet was an astonishing 97-octillion times more likely to match Yingying than any other unrelated individual. Despite Christensen's calculated, post-abduction efforts to scrub his vehicle and sanitize his apartment, his thorough coverup had ultimately failed, leaving behind an irrefutable physical blueprint of the tragedy.

—

The perfect storm that would culminate in the tragic disappearance of visiting scholar Yingying Zhang began to gather in the early morning hours of Friday, June 9, 2017. At approximately 2:00 a.m., Brendt Christensen watched his wife, Michelle Zortman, walk out of their Champaign apartment with her boyfriend, Ryan Vela, embarking on a weekend getaway to the Wisconsin Dells—leaving Christensen completely isolated in their shared home. Rather than attempting to sleep, he walked into a nearby Schnucks grocery store at 7:30 a.m.. Wearing a black T-shirt and carrying mirrored aviator sunglasses in his pocket, he walked directly to the liquor section and purchased a large bottle of Admiral Nelson's spiced rum. He then returned home, shaved off his facial hair, and prepared to execute a dark fantasy of abduction that he had been planning for months.

By mid-morning, Christensen was cruising the quiet summer streets of the University of Illinois campus in his black 2008 Saturn Astra hatchback, actively hunting for a victim. At 9:30 a.m., he spotted his first potential target: Emily Hogan, a university graduate student walking alone on Soughton Street, just east of Lincoln Avenue. Christensen pulled up alongside her and posing as an undercover police officer, he showed her a badge from under his shirt and asked if she would answer a few questions. When Hogan complied and approached his car, Christensen escalated his approach, asking her to get inside the vehicle. Hogan immediately sensed something was deeply wrong, refused to get in, and walked away. Recognizing that his first attempt had failed, Christensen drove off, while Hogan promptly contacted the police to file a suspicious person report and published a warning post on Facebook to alert her fellow students about a man pretending to be a police officer in a black car.

Undeterred by the close call, Christensen continued his search, his psychological decay bleeding into his communications. At noon, he responded to a text from Bullis, typing out a chillingly casual message: "You don't do the anything casual thing, from breathing to fine dining, to...murder". By 1:30 p.m., he was back behind the wheel, circling the campus looking for another opportunity. At 1:57 p.m., as he drove west on Springfield Avenue, he spotted Yingying Zhang desperately running after the Champaign-Urbana MTD bus that had just bypassed her. Sensing her distress and vulnerability, Christensen tracked her, circling the block to position his Saturn Astra so that he was heading north on Goodwin Avenue, where Yingying stood waiting near a tree at the bus stop at Goodwin and Clark Street. At 2:03 p.m., Christensen pulled his vehicle alongside her. Posing once again as an undercover officer, he spoke with the anxious, five-foot-four scholar through his passenger window for approximately one minute. Yingying, running late for her lease appointment and unfamiliar with the area, believed his impersonation. She opened the door and climbed into the front seat at 2:04 p.m.

Within approximately twenty minutes of her entering the vehicle he disabled her iPhone, permanently terminating her cell phone's connection to local towers. Back at his Champaign residence, Christensen then forced her into a six-foot-long heavyweight duffel bag he had purchased online days prior to transport her unseen up to his second-story apartment.

He brought her into his bedroom, where he subjected her to the gruesome attacks he had detailed to Terra in graphic detail during the recorded conversation they had on the campus vigil.

With the murder committed, Christensen’s elaborate, pre-planned cover-up immediately began. Knowing his wife would not return until Sunday evening, he spent the weekend methodically sanitizing his apartment and vehicle. On Sunday, he purchased Drano and Swiffer pads at Walmart, using the chemicals to clear his plumbing and clean the bloodstains off his bedroom walls, carpet, and mattress. He even submitted a maintenance request to have his bathroom grout treated for mold, attempting to erase any trace of the struggle.

The day after the murder, on June 10, Christensen placed Yingying's dismembered remains into three separate, heavy-duty garbage bags and deposited them in the commercial dumpster directly outside his Stonegate Village apartment building. On Monday, he gathered her personal belongings—including her clothing, backpack, textbooks, and cell phone—along with his contaminated cleaning materials into a large duffel bag, scattering them across various trash dumpsters in the Champaign-Urbana area to minimize the risk of detection. That same morning, a sanitation truck emptied the dumpster outside his apartment. Her remains were compacted multiple times during transit before being hauled to a private landfill in Vermilion County near Danville, Illinois.

7.

Following his arrest on June 30, 2017, Brendt Allen Christensen was placed in law enforcement custody and held at the Macon County Jail in Decatur. The legal proceedings moved swiftly, beginning with his initial federal court appearance on Monday, July 3rd at 10:00 a.m. before United States Magistrate Judge Eric Long at the federal courthouse in Urbana, Illinois. At this brief hearing, the charges in the initial criminal complaint were read.

On July 5, Christensen returned to court, where Judge Long formally evaluated his risk of flight and the danger he posed to the public. Assistant U.S. Attorney Bryan Freres argued aggressively against bail, asserting that no combination of release conditions could guarantee community safety. To support this, Freres disclosed chilling details from the FBI's ongoing surveillance, revealing that Christensen had brazenly attended the June 29 campus vigil for Yingying Zhang, where he was recorded pointing out individuals who matched the physical characteristics of his "ideal victim". Additionally, the prosecution revealed that Christensen had been caught on tape describing how Yingying had actively resisted and fought with him. Siding with the government's arguments, and noting that the scholar's body remained missing, Judge Long ordered that Christensen be detained without bail in the custody of the U.S. Marshals Service pending trial.

The provisional charges in the criminal complaint were formalized on July 12, when a federal grand jury sitting in the Urbana Division returned the initial indictment against Christensen. The grand jury indicted him on one count of kidnapping. The indictment specifically charged that he had willfully and unlawfully seized, confined, inveigled, decoyed, kidnapped, abducted, and carried Yingying away for his own benefit, utilizing a cellular telephone and a Saturn Astra motor vehicle—both defined as instrumentalities of interstate commerce—to commit and further the crime.

Christensen made his next appearance in court for his formal arraignment on July 20. Represented at the time by his privately retained defense attorneys, Tom and Evan Bruno, Christensen listened as the formal indictment was read before entering a plea of "not guilty" to the kidnapping charge.

As the legal machinery ground forward, Yingying's family endured an agonizing period of limbo, desperate to locate her remains so they could return to China for a traditional burial. To sustain the pressure on the investigation, Yingying's father, Ronggao Zhang, drafted a formal, deeply personal letter to President Donald Trump. On August 11, the family publicly released the letter, in which Ronggao appealed directly to Trump’s sensibilities as a father, fervently requesting that he direct the full mobilization of federal law enforcement and investigatory resources to locate his daughter and bring their family’s torment to an end.

A week later, Yingying’s mother, Lifeng Ye, and her younger brother, Xinyang (also referred to as Zhengyang) Zhang, arrived in the United States to join the father and aunt in their grueling vigil. For Lifeng Ye, who had been too weak to eat, sleep, or work, coming to this foreign land was a desperate act of love. Every day, Yingying’s father would walk to his daughter’s vacant apartment, sitting there for hours in a quiet, heartbreaking attempt to cure his open wound.

Meanwhile, the legal battlefield began to shift dramatically. In early September, Christensen’s privately retained attorneys, Thomas, Evan, and Anthony Bruno, filed a formal motion to withdraw from the case. The prosecutors had quietly notified the defense that they intended to ask a federal grand jury for new, capital-eligible charges, which would carry the possibility of the death penalty. Recognizing that Christensen and his family were financially incapable of funding the monumental expenses of a federal death penalty defense—which would require massive resources for mitigation specialists and expert witnesses—the Brunos stepped aside. Federal Judge Colin S. Bruce officially granted their withdrawal and appointed Federal Public Defender Tom Patton, who soon brought in experienced capital trial attorneys Elisabeth Pollock and George Taseff to lead Christensen’s defense team.

The anticipated escalation in charges arrived when a federal grand jury sitting in Springfield returned a superseding indictment that fundamentally transformed the nature of the trial. This new indictment officially upgraded the sole charge of kidnapping to kidnapping resulting in death, a federal capital crime that made Christensen eligible for either mandatory life imprisonment or the death penalty. To justify a potential death sentence, the grand jury returned a notice of special findings. These findings alleged that Christensen was over eighteen at the time of the crime, that he had acted with lethal intent, and that the kidnapping was committed in an especially heinous, cruel, or depraved manner involving torture or serious physical abuse. It further charged that Christensen had acted after substantial planning and premeditation to cause death, and added two counts of making false statements to the FBI for his shifting lies during his June 12 and June 15 interrogations. For the legal teams, this superseding indictment meant entering the rigorous, highly confidential review process of the Department of Justice’s Capital Case Section, which would ultimately determine whether the Attorney General would authorize seeking Christensen’s execution.

The tension of these upgraded charges erupted into open court on October 11, 2017, during Christensen’s formal arraignment on the superseding indictment. Entering the federal courthouse in Urbana, Lifeng Ye came face-to-face with her daughter’s accused killer for the first time. Overcome by the unimaginable sight of Christensen, she broke into a sudden, agonizing weeping spell that shook the courtroom. "Give me my daughter back!" she cried out in Mandarin, her desperate pleas echoing through the room before she had to be gently consoled and led out of the gallery by her family. Once order was restored, Assistant Federal Public Defender Elisabeth Pollock stepped forward on Christensen’s behalf and entered a formal plea of "not guilty" to the upgraded charges. Christensen was escorted back to the Macon County Jail in Decatur to await his trial, leaving the shattered Zhang family to return to their silent vigil, still desperately searching for a daughter they feared they might never find.

—

As the case moved deeper into 2018, the legal battleground shifted to the question of where Christensen would be tried. His defence attorneys filed motions for a change of venue, arguing that extensive "prejudicial pretrial publicity" within the Urbana-Champaign community would make it impossible to secure an impartial jury. Siding partially with these concerns, U.S. District Judge James Shadid officially ordered in December 2018 that the trial be transferred to the federal courthouse in Peoria, Illinois. Shadid ruled that the move was logistically practical, as Peoria's facilities were far more capable of handling a high-profile trial, offering four courtrooms to Urbana’s three and more than 1,000 additional parking spaces to accommodate the heavy influx of jurors, family members, and international media.

While these public venue debates were playing out, a critical and highly confidential development occurred behind closed doors. In November 2018, during unsuccessful plea negotiations, Christensen's defence team attempted to secure a deal that would remove the death penalty in exchange for a full confession and cooperating to locate the victim's remains. Under a strict, government-signed immunity agreement, Christensen’s lawyers proffered the exact details of how he had disposed of the body, claiming he had placed her dismembered remains in three separate garbage bags in a commercial dumpster outside his apartment building. Though federal prosecutors ultimately rejected the plea bargain—concluding that Christensen's claims were impossible to verify because her remains would have been compacted, buried under thirty feet of trash, and decomposed at a Vermilion County landfill—the proffer remained legally sealed, preventing the information from being introduced at trial.

As the trial date neared in spring 2019, the defence team encountered a severe strategic obstacle regarding mental health mitigation. They had originally filed a formal notice under a Federal Rule of Criminal Procedure, indicating their intent to present expert psychiatric testimony during the trial's sentencing phase. However, this notice legally triggered the government's right to compel Christensen to submit to a psychiatric evaluation conducted by clinical experts chosen by the prosecution. Fearing the damaging impact of a prosecution-led clinical examination, the defence team abruptly withdrew their notice in April 2019. As a consequence of this tactical withdrawal, Judge Shadid barred the defence from introducing any expert psychiatric testimony regarding his mental state during the trial, and further prohibited their mitigation specialist from presenting his family's complex medical and psychiatric records directly to the jury.

On June 3rd, 2019, the federal capital trial of Brendt Christensen officially commenced under Chief Judge Shadid at the federal courthouse in Peoria, drawing massive crowds of international observers and university students. The proceeding took its most dramatic turn on June 12, during the opening statements of the trial's guilt phase. Executing a highly unusual and risky legal strategy to preserve credibility and save their client from execution, federal public defender George Taseff stood before the packed courtroom and directly conceded Christensen's guilt. Taseff candidly declared to the startled jurors that Brendt Christensen was indeed responsible for the death of Yingying Zhang, admitting in no uncertain terms that his client killed her.

8.

As the federal capital trial of Brendt Christensen progressed in Peoria, Illinois, the courtroom was subjected to an agonizing presentation of forensic and testimonial evidence. A central pillar of the prosecution's physical case was the expert testimony of FBI Forensic Examiner Amanda Bakker from the FBI Laboratory in Quantico, Virginia. Bakker testified in detail about high-resolution nuclear DNA testing conducted on various biological materials recovered from Christensen’s apartment. She explained that a bloodstain found on the underside of the master bedroom carpet—which had leaked through the primary backing despite extensive surface cleaning—was an exact match to the victim. Bakker stated that the DNA was most likely from blood because of its location, and touching or transfer was virtually impossible. She delivered the trial's most staggering statistic, testifying that the DNA profile on the carpet was 97-octillion times more likely to belong to Yingying Zhang than any other unrelated individual. This number—represented as a 97 followed by 27 zeros—was further bolstered by her findings that the DNA on the bedroom drywall and the recovered Louisville Slugger baseball bat was 33-octillion times more likely to belong to Zhang than anyone else, leaving no doubt that the missing scholar had been inside Christensen's bedroom.

The trial’s most anticipated and emotionally raw moments occurred when Christensen's former girlfriend, Terra Bullis, took the witness stand to testify for the prosecution. Bullis walked the jury through her agonizing internal conflict, testifying that she cared deeply for Christensen but was profoundly disturbed by Zhang's disappearance, crying on the stand as she recalled the overwhelming weight of those dual feelings. Bullis described the dynamics of their polyamorous relationship, noting they had embarked on a BDSM affair in which Christensen acted as the "dominant" and she was the "submissive". During cross-examination, defense attorneys attempted to paint Bullis as an active guide into these sexual fetishes and suggested she had enabled Christensen’s severe alcoholism, pointing to the night of the June 29 campus memorial vigil. Bullis, however, recounted that while Christensen drank heavily from a bottle of rum and water and slurred his speech, he did not appear functionally drunk, but was instead "excited" and "amused" by the investigation.

The trial immediately transitioned to the highly contentious penalty phase on July 8, 2019, where the same jury was tasked with deciding whether Christensen would be sentenced to death by lethal injection or serve life in prison without the possibility of parole. To illustrate the immense void left by her death, the government presented emotionally devastating victim-impact testimony. This included in-person testimony from Zhang’s father, Ronggao, and her fiancé, Xiaolin Hou, as well as a pre-recorded video of her mother, Lifeng Ye, weeping over her shattered dreams of seeing her daughter in a wedding dress. The emotional atmosphere in the courtroom became so overwhelming that a female juror burst into tears and ran out of the courtroom during the mother's video. This unprecedented exit prompted Christensen’s defense team to immediately file a motion for a mistrial, which Judge James Shadid ultimately denied after questioning the juror in his chambers.

To counter this gravity, Christensen's defense attorneys presented forty-nine mitigating factors in an attempt to humanize their client and persuade the jury to spare his life. They called his parents, sister, and former jailers to describe his history of severe clinical depression, chronic night terrors, debilitating migraines, and a family history of mental illness and maternal alcohol abuse. They highlighted that Christensen had voluntarily sought help for his homicidal ideations at the university counseling center months before the murder, arguing that institutional failure had left him without the intensive psychiatric care he desperately needed.

Under the federal capital sentencing guidelines, the ultimate decision rested on a strict requirement of absolute unanimity. For Christensen to be sentenced to death, all twelve jurors had to unanimously agree that the aggravating factors sufficiently outweighed the mitigating circumstances. If even one single juror dissented or held out against the death penalty, the capital sentence was legally defeated, and the court was statutorily mandated to impose a mandatory sentence of life imprisonment without parole.

This high-stakes legal mechanism was triggered after the jury spent approximately nine hours deliberating over the course of two days. Grappling with the moral weight of their decision, the jurors sent a note to Judge Shadid stating "we need help" and asking what would happen if they could not reach a unanimous agreement. Sometime after being instructed that a deadlock would automatically result in a life sentence, the jury foreman returned the final verdict form. The jury officially deadlocked on the sentence, failing to reach a unanimous consensus on capital punishment. Consequently, on July 18, 2019, Judge James Shadid sentenced Brendt Christensen to spend the remainder of his natural life in a high-security federal prison with no possibility of release. Shadid closed the legal chapter of the trial with a blistering, severe scolding of the defendant, telling him that his complete lack of remorse was obvious to everyone in the room, and noting with sharp indignation that even 769 days after taking Yingying’s life, Christensen could not muster a simple "I'm sorry".

—

When the trial finally concluded with a mandatory life sentence, Chinese consular officials maintained a prominent presence in the courtroom, striving to balance the need for justice with the diplomatic necessity of restoring confidence in campus safety. Following the verdict, Deputy Chinese Consul General Bian Zichun issued a formal statement expressing satisfaction that the killer had been brought to justice, thanking the FBI and local police departments for their tireless work. Crucially, the consulate's public remarks were calculated to assuage the deep-seated safety fears of families abroad, concluding with a diplomatic hope that Chinese nationals studying and living in the United States would continue to have a secure and supportive academic experience.

By the time Christensen's defense attorneys finally disclosed his statements regarding the disposal of Yingying’s body, the Vermilion County landfill had remained continuously active, and the physical environment of the disposal site had grown astronomically complex. Every day, fresh streams of local municipal waste had been piled onto the active grid where the 2017 deposits had been buried. Engineering reports and landfill logistics indicated that the potential coordinate of her remains was covered by a minimum of thirty feet (approximately nine metres) of tightly compacted subsequent garbage deposits. Additionally, this burial site was not a localized point, but rather spanned an active dumping grid approximately fifty yards wide—roughly half the size of a football field.

When the FBI, the Illinois State Police, and assisting engineering experts evaluated the logistics of a physical recovery, they concluded that a search was forensically and structurally impossible. The mechanical forces of multiple commercial compactions, coupled with natural biological decomposition over ten months, meant that the remains had been severely pulverized. Forensic analysts estimated that any surviving biological or skeletal material would likely be smaller than a standard mobile phone, hidden amidst thousands of tons of compacted municipal waste.

To undertake an excavation under such extreme conditions presented insurmountable environmental and engineering challenges. It would have required moving thousands of tons of heavily compacted, hazardous waste, which would expose recovery crews to biohazards and violate complex federal and state landfill regulations. It would also require extensive, complicated legal negotiations to secure cooperation from private landowners. Most daunting of all was the complete absence of scientific certainty; after sifting through a toxic, thirty-foot deep grid the size of half a football field, there was absolutely no guarantee that any identifiable human tissue or bone could be recovered. Additionally, because Christensen had lied repeatedly to investigators throughout the early stages of the case, authorities had no objective way to verify if his confession was a genuine disclosure or a final, cruel manipulation.

Confronted with these stark engineering assessments, federal and state law enforcement agencies ultimately determined that a landfill search could not feasibly go forward. This painful conclusion forced Yingying’s family to abandon their hopes of recovering her body for a traditional burial in China. In a deeply touching compromise to achieve some form of spiritual peace, her father Ronggao, her mother Lifeng, and her fiancé Xiaolin Hou collaborated with University of Illinois officials to dedicate a permanent memorial garden at the exact campus bus stop where she was abducted. There, at the corner of Goodwin Avenue and Clark Street, they buried a small box containing her clothes, transforming the coordinate of her disappearance into a quiet space of reflection for a dedicated young scholar whose physical remains would forever rest beneath the deep layers of the Vermilion County landfill.

—

Brendt Christensen began serving his life sentence soon after it was handed down. He spent a brief stretch at a federal evaluation center before being sent to USP McCreary in Kentucky in late 2019, then was transferred again in early 2020 to USP Coleman II, a high-security federal penitentiary in Florida, where he remains today.

Meanwhile, the family’s efforts to seek civil accountability against the institutional systems that had failed to flag Christensen's homicidal warnings ended in quiet dismissals in both federal and state courts. On December 30, 2019, Federal Judge Colin S. Bruce dismissed the civil lawsuit filed by the estate of Yingying Zhang against University of Illinois social workers Thomas Miebach and Jennifer Maupin, ruling that her death was too remote a consequence of their actions to hold them liable under federal civil rights law. A subsequent state-level lawsuit refiled in Champaign County was similarly dismissed in June 2020 by Judge Jason Bohm, who concluded that Illinois law could not impose a legal duty on mental health professionals to breach patient confidentiality without a specific, immediate threat to an identifiable victim.

9.

As Christensen settled into Florida's federal prison system, law enforcement officially closed their investigation into his serial killer claims, finding no evidence to support his boast of twelve prior victims. While federal investigators initially launched a massive, multi-state search—identifying nineteen potential missing or murdered women and children in Wisconsin who could have fit his profile—the FBI ultimately recovered not a single shred of physical evidence, digital traces, or secondary testimony linking Christensen to any other crime. Experts and investigators concluded that his boasts of historical murders were false, born out of a delusional, alcohol-fueled desire for notoriety and a self-absorbed drive to assert criminal expertise.

In the years that followed, the story of Yingying Zhang was preserved not by the sensationalized confessions of her killer, but by her family’s extraordinary resilience and her lasting legacy. The emotional reality of their loss was captured in the acclaimed 2020 documentary film Finding Yingying, directed by Peking University alumnus Jiayan "Jenny" Shi, which focused compassionately on her high academic aspirations and her family's quiet dignity. Leading up to August 2026, her family continues to live through an endless, agonizing nightmare of grief in Nanping. To secure financial stability and keep her memory alive, her father, Ronggao, and mother, Lifeng, took the unexpected path of selling goods through live-streaming. The endeavor has been bittersweet; Lifeng still falls asleep listening to recordings of Yingying singing, and the mention of her daughter's name frequently forces them to cut their broadcasts short in tears. Her younger brother, Xinyang, who still uses the date of her disappearance, "2017/6/9," as his online username, welcomed a son with his wife to bring some joy to their cheerless home. Her fiancé, Xiaolin Hou, who completed his own doctorate, spent years teaching disadvantaged children in Guangdong to honor one of her unfulfilled dreams, while actively working with the family to arrange future trips to the United States to continue searching for her remains. Yingying's legacy is physically anchored on campus by the memorial garden at North Goodwin Avenue and West Clark Street, and by the "Yingying Fund," an endowment established through the university to support international students and families navigating sudden crises.

Ultimately, the tragic chronology of June 9, 2017, leaves behind a crushing, haunting irony that the family must carry forever. Left stranded on the pavement by a bus driver complying with company protocols, Yingying was placed directly in the path of Brendt Christensen's black Saturn Astra.

In a narrative marked by unspeakable horror, the most agonizing detail of all remains that her death was set in motion by a simple, dutiful act of safety.

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