Behind a church lies a dismembered body burned beyond recognition; investigators identify the victim and receive a tip the suspect is a female; a police interview reveals her as the most remorseless psychopathic killer they’ve ever seen.

A husband becomes the prime suspect when his wife goes missing as police discovers his checkered past; lacking a body or evidence of foul play, detectives hope to gain a confession from a man they realize might be a cold-blooded psychopath.

A young girl disappears, and detectives find a psychopath who duped her.

An impulsive psychopath randomly kills a successful female executive.

« Previous Ep. Next Ep. » Investigators search a farm for a missing man and find human leg bone on the property. The owner, Susan Monica, admits that her pigs ate her tenant alive, and he's not the only victim. A ruthless psychopath, Monica despises humans but loves her pigs.

While being questioned in the abduction of an Anchorage barista, a young local businessman starts negotiating with investigators to reveal details of a depraved secret life as one of America's most meticulous and psychopathic serial killers.

When women kill, it’s shocking to many of us. However, female psychopaths may not be as rare as we imagine. We’ll examine some of the unique characteristics of female psychopathic killers, and explore the horrific crimes that they’ve committed.

A frantic graduate student calls 911 to say she just shot her boyfriend in self-defense. Police soon discover that her story doesn't add up and realize they are face-to-face with a remorseless, calculating psychopath.

Residents of a quaint village are terrified when a local innkeeper and two others are found brutally murdered. Detectives in Maine must follow the depraved killer into the woods at night as he leads them to where he killed and buried a fourth victim.

After a house fire in Texas, suspicion lands on John Hummel when his family's brutally murdered bodies are discovered in the ashes, and he doesn't blink an eye. Now an inmate on death row, he grants a final interview weeks before his execution.

After his conviction for the brutal slaying of his wife, a Florida inmate lays claim to another unsolved murder 17 years prior, revealing that he's a manipulative psychopath with a history of violence and an unquenchable thirst for revenge.

A mother awakes to find her two sons with their throats cut. Their aunt's boyfriend confesses to his mother, and she wears a wire to capture her son. As he admits his guilt, it's clear how a psychopathic rage led to horrific violence and innocent victims.

A 50-year-old woman is found dead in her home. All that's left behind is a note that reads, "Chase me." But when detectives uncover the killer, they quickly discover they have come face to face with a remorseless psychopath.

A prolific serial killer brags on tape about strangling eight young women.

A heartless gunman shoots a young couple with devastating consequences.

A home invasion leads to the revelation of a shocking double life.

A man confesses to accidentally killing his best friend while cleaning his gun; during his interrogation, he stuns police by revealing that he’s behind a long trail of bloodshed and is a serial killer who seems to consider himself an angel of mercy.

An unapologetic 14-year-old boy confesses to the murder of his best friend. Twelve years later, he's back in court with chance at a reduced sentence. Has this 26-year-old really changed? Or is he the same meticulous, cold-blooded killer he always was?

An arrogant woman believes she's committed the perfect crime. She is wrong.

A college student disappears at the start of his freshman year without a trace, leaving his family and his girlfriend reeling; when authorities look to his best friend for answers, they uncover a love triangle gone wrong.

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 New Hampshire village is in shock after four adolescents were arrested for robbing and murdering a 42-year-old mother and maiming her 11-year-old daughter. Detectives discover two individuals who are vicious psychopaths rather than ordinary criminals.

A missing person's report leads police to a career criminal and his partner, uncovering a twisted path of illicit schemes, drugs, and exploitation.

A road rage incident turns deadly as an elderly man is beaten to death by a teenager who claims he was acting in self-defense. Detectives not only find holes in his story but uncover that he is a remorseless and utterly manipulative psychopath.

Experts explore cases of psychopathic killers known as family annihilators.