The suspect in Zhang Yingying case bought sewer dredging agent. Details of the recent progress of Zhang Yingying case
4hw.com.cn: according to the latest report of the associated press on the 13th, the prosecution showed a surveillance video from a local community store to the jury in court that day, showing that the suspect Christensen bought drano, a chemical specially used to dredge the sewer, and a 13 gallon (equivalent to the volume of 2.6 barrels of barreled water) kitchen garbage bag there on the third day after Zhang Yingying was killed.
However, it is reported that it is unclear what the purpose of Christensen's purchase of these items is. An FBI agent attended the trial as a witness. He confirmed that he had conducted a large-scale search for Zhang Yingying in Illinois.
The search extended from the local park to the coal mine 30 miles (48 kilometers) away, but found no evidence of her condition, so she was presumed dead