The Investigators - Season 8 (2007)

The cases of aspiring models 31-year-old Donnalee Duhamel, 21-year-old Shari Miller, and 15-year-old Tracey Campbell, who were strangled to death and mutilated in California between 1978 and 1984.

The case of Carole A. Garton and her 8-month-old unborn baby, who were shot to death in Cottonwood, California in 1998.

A couple celebrating their wedding anniversary go for a stroll on the beach after dinner. Out of nowhere, a masked robber jumps them, steals their valuables then shoots and kills the husband. Police launch an intensive manhunt for the killer but come up empty. But the story begins to take a huge turn when friends of the husband bring the grieving wife's behavior in the weeks before the crime into the open.