
World's Most Evil Killers
Colin Ireland made a New Year's resolution in 1993 to become a serial killer and then murdered five gay men in London. In 2006, he got a whole life term.

Colin Ireland made a New Year's resolution in 1993 to become a serial killer and then murdered five gay men in London. In 2006, he got a whole life term.

Stephen Griffiths, the self-proclaimed Crossbow Cannibal, had always fantasized about murder. In 2009, he acted on his murderous instincts and killed three women.

Cesar Barone was an American serial killer who took the life of four women in and around Hillsboro, Oregon in the 1990s.

A cult killer portrayed himself as a pillar of the community, but his story was deeply sinister.

The story of the serial killer who worked as a nurse in Texas, where she killed many children and infants.

Rodney Alcala appeared on "The Dating Game" and it led to his arrest. In 2011, he was found guilty of murdering six women and a twelve-year-old girl.

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

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.

An investigation into the man known as the 'Babes in the Wood Killer,' who evaded justice for over thirty years after strangling and molesting two nine-year-old girls in 1986.

Railway Killers John Duffy and David Mulcahy killed three women and raped many more across a four-year period in the early 1980s.

The story of one of the most prolific serial killers in Canadian history, "The Pig Farmer Killer."

By the age of nineteen, Polish schoolboy Karol Kot, aka the Vampire of Krokow, had killed two people. He tried to kill many more in arson and poison attempts and was executed at the age of twenty-one.

Stephen Farrow committed two murders in early 2012 motivated by an obsessive hatred of Christianity, which he attributed to sexual abuse from a priest.

Dennis Nilsen killed at least twelve men in the late 70s and early 80s in Muswell Hill, London.

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

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.

Billy Mansfield Jr. moved between Florida and Michigan, targeting vulnerable women and girls.

John Allen and his teenage accomplice carried out the brutal series of shootings that killed ten.

In 2012, one-eyed gangster Dale Cregan went on a ruthless killing spree and murdered four people in Greater Manchester. He killed a father and son as well as Police Constables Fiona Bone and Nicola Hughes.

David Berkowitz aka the Son of Sam is a serial killer who murdered six people and brutally wounded seven others in the late 60s. When he was arrested, he claimed that the devil made him do it.