A coalition of state, federal and the FBI police agencies join forces to to solve a case.

Police discover a murdered teenage girl was involved in a love triangle.

Police in Abbotsford, B.C. hunt a stalker who has left one teen dead and another barely alive.

A killer who leaves messages signed "Jack" terrorizes East Point, Ga.

Police try to track down the killer of two elderly women.

Phoenix police face a unique serial killer team that is stalking and killing innocent people.

A Texas playboy is murdered, and police uncover X-rated photos, shocking videos and an object hidden inside the victim's body.