Evidence supporting his guilt of rape included the approximately 400 videos shot by Obara, which showed him raping women (including one with Ridgway). For the charge of manslaughter, the prosecutor produced an autopsy report showing traces of chloroform in Ridgway's liver and a paper trail showing that Obara accompanied her to the hospital before she died.
Evidence confirming his culpability in rape included the roughly 400 videos shot by Obara, which depicted him assaulting women (including one with Ridgway). For the charge of homicide, the prosecutor presented an autopsy report revealing chloroform residues in Ridgway's liver and a paper trail indicating that Obara accompanied her to the hospital before she passed away.