This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.PEORIA, Ill. — Jurors deliberated less than 90 minutes before returning a guilty verdict Monday at the federal death-penalty trial of a former University of Illinois doctoral student who killed a visiting scholar from China after abducting her at a bus stop as she headed to sign an off-campus apartment lease. The swift conviction was expected because Brendt Christensen’s attorneys acknowledged from the start that he raped and stabbed Yingying Zhang in June 2017. Prosecutors say he beat her to death with a baseball bat and decapitated her. Christensen showed no emotion while the verdict was being read. A lawyer says 26-year-old Zhang’s family will ask a federal jury to recommend that Christensen be put to death for the murder. Zhidong Wang represents Zhang’s family. He told reporters shortly after the verdict that the family has already asked prosecutors to request the death penalty. With Zhang’s parents standing behind him, Wang says the family still can’t imagine how they will spend the rest of their lives without her. The judge has said there will be a break of a week or more before the penalty phase, a sort of mini-trial that could last several weeks. Illinois no longer has capital punishment, but he could be sentenced to death because he was convicted in federal court. There are more than 5,000 Chinese students of the 45,000 attending the University of Illinois in Champaign, among the largest such enrollments in the nation. They have closely followed developments from the trial at U.S. District Court in Peoria. Wang said the family still believes other Chinese families should still send their children to study in the United States. He called the killing an isolated incident. Zhang had been in Illinois for just three months — her only time living outside China. The daughter of working-class parents, she aspired to become a professor in crop sciences to help her family financially. Friends and family described her as caring and fun-loving. Defense attorneys began the trial with the rare admission that their client killed Zhang but said they said they disagreed with prosecutors over how and why. They surprising strategy was a bid to start immediately trying to persuade jurors to spare Christensen’s life. Jurors heard evidence that Christensen boasted he killed 12 others before killing Zhang, starting when the Stevens Point, Wisconsin, native was 19 and still living in Wisconsin. He began his studies in Champaign at the university’s prestigious doctoral program in physics in 2013. His lawyers said he made the claim about being a serial killer when he was drunk and that it’s not true, but the FBI didn’t rule it out. Christensen, now 29, lured Zhang into his car on posing as an undercover officer when she was running late to sign the lease on June 9, 2017. The muscular Christensen forced the 5-foot-4 Zhang into his apartment in Urbana, Champaign’s sister city 140 miles (225 kilometers) southwest of Chicago, where he raped and killed her. Zhang was unlucky to be in the wrong place at the wrong time, prosecutors said, saying Christensen — who had fantasized about killing — determined to kill someone that day and had been cruising in his car looking for a victim. Earlier, he approached a different young woman posing as an officer, but she refused to get in the car. He and his girlfriend, Terra Bullis, attended a vigil for Zhang on June 29, during which Bullis wore an FBI wire recording him detail how he killed Zhang. As they left at night, she said she’d rather not call a ride-sharing service, telling him: “My version of safer is walking at night with a serial killer.” He responds: “Yeah. That’s me.” Jurors heard those recordings during trial. On Monday, those recordings were released. At one point, Christensen is heard describing what happened when he “chopped open” Zhang’s head. Christensen was arrested on June 30, his birthday. Jurors found Christensen guilty of kidnapping resulting in death, which carries a possible death sentence. Prosecutors are expected in the penalty phase to focus on Christensen’s brutally, with the defense broaching mental health issues. Christensen sought help from mental-health counselors at the school for homicidal and suicidal thoughts in the months before Zhang vanished, according to his lawyers, who said his life was spinning out of control. In his first few semesters as a doctoral student, Christensen was making straight As but by late 2016 was getting Fs in all his classes. The federal death-penalty case is the first in Illinois since the state struck capital punishment from its books on grounds death-penalty processes were too error-prone. Some Illinois anti-death penalty activists criticized what they said was the government’s imposition of a death-penalty case on a non-death penalty state. The jury will begin the sentencing phase on July 8.