F2: Forensic Factor - Season 4 (2007)

Between January 1994 and April 1996, in central Florida, the bodies of four men are found in a wooded area known as The Hog Trails. All are severely decomposed, all are naked, and all have been genitally mutilated. Police realize they are chasing a serial killer, but the investigation is hampered by the fact that they are unable to identify any of the victims. Finally a fifth body yields a name.

Carole Sund, her daughter Juli and friend Silvina Pelosso go missing while vacationing in Yosemite National Park. The theory is that they had a car accident. What begins as a search and rescue operation becomes a chilling case of murder when the bodies of two of the women are discovered in the trunk of their burned out rental car.

April, 1992. An elderly couple is found dead in the trunk of their car at their home in upscale Toronto. The investigation eventually leads authorities to the couple's vacation home one hour north of the city. Police soon learn of the "House Hermit"- a mysterious intruder breaking into area cottages and camping in them. He becomes the prime suspect in the murders.