
World's Most Evil Killers
Richard Kuklinski claimed to have murdered over 100 people for New York and New Jersey's crime families.

Richard Kuklinski claimed to have murdered over 100 people for New York and New Jersey's crime families.

In 1999 and 2000, John Eric Armstrong cruised the streets of Detroit, Michigan looking for sex workers.

When Mary Gough was found dead in her family home, her husband Colin Whelan appeared shocked.

Over a 25-year career of murder, Richard Biegenwald killed at least six people.

The story of the killer who attacked his ex-girlfriend in a jealous frenzy and committed a brutal murder.

For one week in 2016, Stefano Brizzi stored the body of a policeman in his flat in central London. Taking inspiration from the TV show "Breaking Bad," he tried to dissolve the body in his bath tub.

John Sweeney killed two of his former girlfriends and then dumped their dismembered bodies in canals in Rotterdam and London. He was sentenced in 2011 and was given a whole life tariff.

The story of 27-year-old Pawel Relowicz, who raped and killed 21-year-old Hull student Libby Squire.

Catherine Nevin reported a break-in and violent attack at her pub, which left her husband dead.

In 1999, California handyman Cary Staynor raped and murdered four young women. Obsessed with Big Foot, he became the monster in the woods.

In 1991, Christopher Hightower slaughtered an entire family to cover up a trail of fraud. He buried his victims in shallow graves. In 1993, he was sentenced to life without parole.

Sante and her 23-year-old son Kenny Kimes were a murderous duo who killed three people in the late 90s, including an 82-year-old woman.

Stephen Port callously killed four young men between 2014 and 2015.

Velma Barfield became the first woman to be executed by lethal injection after taking six lives.

In October 2012, Mark Bridger abducted and murdered five-year-old April Jones in Machynlleth, Wales. Evidence found on his laptop led to his conviction.

Randy Kraft was a well-spoken, well-respected computer expert...and a prolific serial killer.

Paul Runge raped and killed seven people in Chicago. Police lacked evidence to arrest him despite suspicions.

The chilling story of Lee Ford, who killed his wife and four stepchildren in a murder spree.

In May 1990, convicted killer Jack Unterweger was freed from prison. He became a celebrated writer and a prison reform advocate in Austria until it was discovered that he killed nine more women.

A jailing for the shocking murder of author Helen Bailey leads to a second conviction of another.