The 1968 murder of Navy ensign Andrew Muns by a shipmate during the Vietnam War is reopened 30 years later and brings a murder charge in 2002. Also: DNA from a cigarette butt helps solve a 20-year-old rape-murder case.
Examining the crimes of rapist Keith Laster, who was convicted in 2005 of raping four Rochester, N.Y., girls in 1995 and 1997. Also: the 2005 conviction of Manuel Bracamontes for the 1991 murder of 9-year-old Laura Arroyo in Chula Vista, Cal.
A 12-year-old girl is murdered in her home, and her brother is charged. Overlooked evidence is examined years later and suggests a transient is responsible. Next, a woman is found dead, the apparent victim of a sexual assault. A suspect is quickly arrested, but released for lack of evidence. Sixteen years later, a case is built against the man.
The 100th episode examines the case of serial killer Gary Ridgway, known as the Green River Killer, through the reminiscences of Dave Reichert, a lead detective in the investigation. Ridgway murdered 48 women before he was caught in 2001.