S1/EP10 Detectives pressed Mark Hensley on what he saw and heard the night Kathleen Noble was murdered. After a sound check, they were sure he must have heard something, either during the murder or when the killer cleaned the scene.

S1/EP10 As police probed Kathleen Noble's murder, they looked at her roommate and co-worker Mark Hensley. He was a longer who had had several brushes with the law involving theft. One witness said he was afraid of Hensley.

S1/EP10 Kathleen Noble's apartment had been scrubbed, but luminol revealed many traces of blood. Her mattress had also been turned over. A home invader would not likely have gone to such lengths to clean the scene.

S1/EP10 Police interviewed Kathleen Noble's roommate Mark Hensley. He claimed to have heard Kathleen arguing with a man in her bedroom, but he couldn't be sure who it was.

S1/EP10 Forensic investigators examined Kathleen Noble's apartment, finding blood on her bed, on the floor and leading out of the apartment. It appeared she had been dragged off the bed and out the front door.

S1/EP10 In East Palo Alto, officers responded to an abandoned vehicle. A foul odor emanated, and underneath a blanket they found Kathleen Noble's body. She had been missing for days and her body had likely been there for a while.

S1/EP9 Police interviewed Gerald Powers, who claimed to have had nothing to do with Shannon Sanderson's disappearance. They spoke with a friend, who told him she agreed to be his alibi, as a joke, as long as "he didn't kill anybody."

S1/EP9 Shannon Sanderson's son said he was relieved when Gerald Powers was sentenced in 1998 for her murder. Powers has remained on death row for 20 years.

S1/EP9 Gerald Powers had been convicted of robbing three women previously. Detectives believed he had learned from his mistakes and killed Shannon Sanderson to keep her from being a witness. He may have been on his way to becoming a serial killer, they believed.

S1/EP9 Shannon Sanderson was last seen in a black dress and high-heels, with fake pink fingernails. Investigators found one nail on the ground by her car, and a witness claimed to have seen her being stuffed into the back of another vehicle.

S1/EP9 Self-made millionaire Robert Sanderson was the initial chief suspect in his young wife Shannon's disappearance.

S1/EP9 A neighbor heard something outside around 4:45 a.m. Shannon Sanderson was arguing with someone by her car. Minutes later, she had disappeared.

S1/EP8 Michael Overstreet remains on death row because of mental incompetency. Kelly Eckart's mother even said she can tell he is "suffering inside his own mind," and that he can't be executed if he doesn't know why it's happening.

S1/EP8 A Franklin Walmart employee recalls getting on the intercom to inform store employees that Michael Overstreet had been found guilty of all charges. The whole store cheered. There was a sense of relief in the community that the case had been solved.

S1/EP8 Kelly Eckart's mom, Connie Sutton, says her daughter was a top-of-her-class student, and loved color guard, until she was murdered.

S1/EP8 Authorities identified Kelly Eckart using dental records. She had been strangled with her overalls straps and suffered a nonfatal bullet wound to the head. She had also been sexually assaulted, and authorities got some DNA from her.