The Texas tragedy that inspired an early warning system.

The Delphi Murders remain unsolved, though their families hold out hope.

Scam artists turned brutal killers.

There are eerie similarities.

A viral case at an L.A. hotel with a shady past...

Bizarre fetishes and baffling offenders.

The party's over.

Criminal cases from the infamous to the forgotten.

Another heartbreaking loss connected to the incredible sexual abuse survivor advocate.

He turned a small patch of land into a garden of horrors.