Serial killers are real-life nightmares.

This killer suitor lured numerous victims into sham marriages, then murdered the women and burned their bodies in his fireplace.

She butchered three women and then cooked the remains into soap and teacakes—all in the name of breaking a family curse.

They were some of the most disturbing murderers to have stalked the earth ...

Who was the man (or woman) behind history's grisliest unsolved murder?

This lethal caregiver is suspected of killing 40 babies in medical facilities across Texas—and evaded capture thanks to a hospital cover-up.

He stalked the remote hiking trails of the southern United States, leaving a trail of death in his wake ...

If he’s to be believed, this violent wanderer was one of America’s most prolific serial killers ever.

He stalked the remote hiking trails of the southern United States, leaving a trail of death in his wake ...

He stalked the remote hiking trails of the southern United States, leaving a trail of death in his wake...

Three years before Jack ripped through London, a madman stalked the streets of Austin, Texas, slaughtering women where they slept.

One woman's escape led police to a literal house of horrors.

This serial poisoner lured numerous suitors to their deaths, until her toxic ways resulted in a a one-way ticket to the electric chair.

From the Vampire of Düsseldorf to the Killer Clown of Chicago, these creepy serial killer quotes are sure to make your blood run cold.

An axe-wielding maniac stalked the streets of the Big Easy, and the only way to avoid slaughter was to play jazz.

Some victims died because they happened to leave their doors unlocked. Others had been methodically stalked.

From a deadly lovers' quarrel to the grisly killings of John Wayne Gacy, uncover the murder behind the melody in these haunting ballads.

From Nazi nut-sos to commonplace quacks, these monsters of malpractice have but one diagnosis in mind: death.

We see London, we see France, we see a Russian granny chopping up bodies with her bare hands.

The brutal slayings shocked the citizens of Australia and beyond. 

The grisly crimes of these international killers prove madness knows no bounds.