The fifth season opens with a case involving a high-school girl who was murdered in 1985.

A Georgia woman is murdered just before Christmas.

A cold case involving a 1988 murder in Sunset Beach, Cal., is investigated.

A 1992 case involving the shooting death of a Maryland businessman is investigated.

A 1990s cold case involving a serial rapist in St. Louis is reopened.

Examining a cold case involving a San Diego postal worker who was murdered in 1972.

The 1992 murder of a church deacon is investigated.

Investigating the 1992 slaying of a Las Vegas woman.

Investigating a 1997 quadruple murder in Bartow, Fla.

A mother's tireless pursuit for justice in her son's murder leads investigators to find a crucial clue.

A former Marine goes missing from his home.

A hotel manager is doused with acid in broad daylight.

A fortuneteller and her daughter are brutally murdered in 2005; a paper trail leads investigators to the culprit.