A teenage girl is found stabbed to death the morning after a Halloween party; now, 15 years later, the victim's parents are more determined than ever to see her killers punished.

A woman's torso is found floating in the waters off of Key Biscayne, Fla., and her identity remains a mystery for nearly 25 years until two grown sisters come forward to tell police about the abuse they endured and where it ended.

In New York, a teenage boy vanishes without a trace after sneaking out to meet up with friends, leaving everyone in doubt as to whether he ran away or came to a tragic end.

A young man is killed at his father's home when a truck falls off its jack crushing his chest, but this apparent accident soon reveals itself to be something more sinister.

In Pennsylvania, a parishioner is shot to death while working in the office at her church, sending shockwaves through the congregation.

A murderer kills Ellen Sherman in her home with her husband away; the investigation uncovers allegations of wife swapping, and the case goes cold until a forensic scientist and a teenager help crack the case.

A tax fuel auditor goes missing, and the investigation expands into the disappearance of a long-haul trucker from 13 years earlier.

A young woman on the verge of marriage with a new job is found dead in her home with "1" scrawled on the wall in lipstick.

Thirty-eight-year-old Danny Coleman's charred remains are discovered 50 miles from home, and the effort to hunt down his killers will take nearly two decades, involving sex, drugs and a voice from the grave.

Two fraternity brothers are inseparable until after college when their once close friendship ends in murder.

A city worker is gunned down at work.