On Wednesday, Snohomish County Medical Examiner Norman Thiersch testified it would have taken four to five minutes of constant pressure to strangle Biendl. It took significant force to fracture the cartilage in her neck while she struggled to survive, he said.
Scherf's DNA was found on Biendl's fingernails. His blood was found on her coat and the amplifier cord, forensic scientists from the state crime lab testified.
Scherf's hands were bright red with an obvious mark across a palm, testified a Monroe police detective who saw him a few hours after the killing.
Scherf said he blacked out while pulling on the cord. When he came to, he was sitting in a chair in the back of the church sanctuary. He told detectives he had no memories of Biendl dying.