Motives & Murders Cracking the Case

When the mutilated body of 17-year-old Lori Billingsley is found in a ditch on the outskirts of town, it's obvious a sadistic killer is on the loose in Oregon. But when the case goes cold, it's her sister who's determined to get justice for Lori.

Deep in Southern Louisiana, the bodies start piling up in a series of deadly home invasions. There's a curious link between the victims and a similar MO, and before long a combined task force is on the hunt for a serial killer.

In a sleepy New Hampshire town, a man answers a knock at the door and is shot dead through the screen. Investigators are stumped. That is, until they uncover a seething grudge and a culprit closer to home than anyone could have imagined.

A high school senior is murdered in her family's Minnesota farmhouse, but with little evidence the case soon goes cold. Years later, a fresh set of eyes spots an overlooked clue, but cold case detectives will need more to convict the killer.

A respected widow is beaten to death in her Salt Lake City home. Investigators suspect the victim knew her killer, but it will take 20 years before a set of children's fingerprints can put him at the scene of the crime.

When 18-year-old Lisa Monza is murdered in San Lorenzo, California, investigators look for a connection to other unsolved murders in the area. But it will take several years and help from an unlikely source before they can track down her killer.