SerialKiller

Kelly Cochran killed the man that she was having an affair with as well as her husband, earning her the nickname the Devil Woman of Michigan.

Named "the most prolific serial killer in U.S. history" by the FBI, Samuel Little is believed to have murderer 93 people, most of them women.

The West Mesa Bone Collector shook the citizens of Albuquerque after the remains of 11 women were found dumped in the middle of nowhere by a dog.

The Dnepropetrovsk maniacs were a group of Ukrainian men that committed over 20 murders in just two months, many of which were filmed.

John George Haigh, better known as the Acid Bath Murderer, would kill his victims and then dissolve their bodies in tubs of sulphuric acid.

Israel Keyes became notorious after sending a horrific photo of his last victim to her family. His crimes before that were equally disturbing.