Serial killers are real-life nightmares.

Bundy reached out to FBI investigators to offer assistance.

Known as the Ypsilanti Ripper, the Michigan murderer beat and strangled seven women between 1967 and 1969.

The truth is more chilling than fiction.

But he never revealed the killer's identity...

How did England’s first female serial killer manage to poison three husbands and 11 children before being caught?

Parking tickets, floppy disks and escaped victims helped catch these murderers and bring them to justice.

Some had no idea about their husbands’ crimes. Others clearly did.

And how one television show saved an innocent man.

With his devilish good looks, he brought new meaning to the term 'lady killer.'

Today, no one knows where the Monster might be.

Though Robert Hansen admitted to murdering seventeen people, Beth van Zanten was not one of them.

Ronald J. Dominique, dubbed the Bayou Strangler, went on a decade-long murder spree in rural Louisiana.

Care for a bedtime story?

In the late 1970s, the "Vampire of Sacramento" brutally murdered six people in less than a month.

Get inside the mind of the cannibal killer.

The reality of the Manson Family was even stranger and more terrifying than you may think.

Even as a child, Dahmer’s life was troubled…

Serial killer Jeffrey Dahmer speaks out in this incredible new trailer.

These killers stopped at nothing to prove their twisted love.

He seemed like a common criminal, until police uncovered the grisly truth.