Testimony: Suspect bought Drano after Chinese scholar death

FILE - This photo provided by the Macon County Sheriff's Office in Decatur, Ill., shows Brendt Christensen. Jury selection starts Monday, June 3, 2019

FILE - This photo provided by the Macon County Sheriff's Office in Decatur, Ill., shows Brendt Christensen. Jury selection starts Monday, June 3, 2019

FILE - This 2017 file photo provided by Xinyang Zhang shows his sister, Yingying, with their parents, Ronggao Zhang, right, and Lifeng Ye, at a train

FILE - This 2017 file photo provided by Xinyang Zhang shows his sister, Yingying, with their parents, Ronggao Zhang, right, and Lifeng Ye, at a train

FILE - This 2016 selfie provided by her family shows Yingying Zhang in a cap and gown for her graduate degree in environmental engineering from Peking

FILE - This 2016 selfie provided by her family shows Yingying Zhang in a cap and gown for her graduate degree in environmental engineering from Peking

PEORIA, Ill. (AP) — Testimony in the trial of a former University of Illinois doctoral student accused of killing a visiting scholar from China revealed that the defendant bought Drano and garbage bags three days after the slaying.

The detail came Thursday during the second day of the federal murder trial of Brendt Christensen in the June 2017 death of 26-year-old Yingying Zhang.

The (Champaign) News-Gazette reports that an FBI agent testified about the massive search for Zhang that extended from local parks to a coal mine 30 miles (48 kilometers) away but didn't produce any evidence of what happened to Zhang who's never been found and who is presumed dead.

Prosecutors say she was raped, choked, stabbed and beaten with a baseball bat before being decapitated.

Thursday's testimony came a day after defense attorneys , hoping to spare Christensen the death penalty, acknowledged he killed Zhang.