shover: i'd never seen anything like this.ver seen a dead body positioned and staged the way this one was. narrator: this staging took time, and a lot of it. so did the attempt to clean up the crime scene. johnston: all of the bedding has been removed, and it is in the wash machine. whatever staining had been on the bedding is most likely removed in the wash, and so we're unable to match it up. narrator: oddly, for a crime with clear sexual motivations, chanin had not been raped. the autopsy revealed petechial hemorrhages in chanin's eyes -- confirmation that strangulation was the cause of death. and this gave investigators a possible break. there was something chanin's killer apparently didn't realize. chanin may have just taken a shower. her hair looked like it was air-dried. narrator: that meant her body might provide a good, freshly cleaned template for the killer's dna. if there's any kind of suspicions that someone may have been manually strangled, typically, the medical examiner will take swabs of the neck. narrator: wh