A man crashes into the back of a woman's vehicle one morning. Officers respond to the scene only to find her car abandoned. Witnesses point to the other driver, and detectives are horrified to discover a sadistic psychopath who admits to murder.

An officer responds to a 911 call placed by a robber on the lam who feels compelled to turn himself in. However, when the officer arrives at the scene, the criminal confesses to much more than breaking and entering.

When a graduate student suddenly goes missing, the family he's staying with immediately contacts police. Then, just days later, a horrific discovery forces investigators to face a rare kind of monster.

Police respond to a 911 call to find a father of two dead in his home with more than 15 gunshot wounds. Police question the family, but one person is missing: his mother-in-law. Now detectives must determine if this grandma could be a deadly psychopath.

The naked and mutilated body of a mother turns up at the bottom of a ravine in Baton Rouge, Louisiana. When tire tracks lead investigators to a suspect, they encounter an undetected serial killer who confesses to butchering eight women over a decade.

A young woman makes a frantic 911 call about a brutal home invasion, which results in the shooting of her mother and father; as police interview her, they uncover a secret double life and an elaborate web of lies spun by a maniacal psychopath.

A lone gunman shoots a young man and woman on their way home from the gym where they work; while interrogating a suspect, detectives learn that this is no random attack but the twisted plan of a deranged psychopathic stalker.