In Bellevue, Wash., a twisted murderer preys on young women leaving their bodies in sadistic poses; as police work to draw crucial connections, an unconventional clue surfaces and leads them to an unlikely killer hiding in plain sight.

When a woman is found brutally murdered in her home, all signs point to a local troublemaker, then more bodies start piling up, making police realize they may be dealing with a serial killer, who is preying on the town's most vulnerable citizens.

In Amherst, N.Y., a missing college student's body is found hidden in the woods near a bike path, making the townspeople realize that the predator who has been stalking women for years has escalated from rapist to killer.

Firefighters find the bullet-ridden bodies of Robert and Dorothy Pape while responding to a call about smoke billowing from a garage, in which they find a truck on fire; later, police realize the smoldering truck does not belong to the homeowners.

The Necktie Killer strikes fear in the hearts of Atlanta's citizens; detectives from neighboring counties piece together correlative clues and distinctive apparel left behind at each crime scene.

Dallas has its dark side, but nothing compares the horror of a series of women found murdered with their eyeballs surgically removed; a pair of beat cops use their street savvy to lead detectives to a sadistic killer and his bizarre motive.

A woman's husband is murdered by an intruder wearing a clown mask. After three more victims are killed by a deranged clown, police realize they're dealing with a serial killer.

A series of murders in California bear eerie similarities, but police have trouble connecting them -- that is until unique ballistics, mysterious surveillance, and a bloody cell phone lead them to three criminals on a deadly revenge spree.