World's Most Evil Killers

A profile of Karol Kot, who killed an 11-year-old boy and an 86-year-old woman.

Diane Downs was convicted for the 1983 murder of her daughter and attempted murder of her other two.

Gary Leon Ridgway, also known as the Green River Killer, is one of the most prolific serial killers in United States history.

America's most notorious serial killer Ted Bundy confessed to the murder of 30 young women across the US between 1974 and 1978. He was executed in 1989.

Colin Ireland pleads guilty to torturing and murdering five gay men he picked up in 1993.

Angus Sinclair is acquitted in 2007 in the trial for the World's End Murders.

Aileen Wuornos, one of America's most prolific serial killer murdered seven men in Florida by shooting them at point-blank range. She was eventually convicted and sentenced to death by lethal injection in 2002.

Serial killer Robert Lee Yates kills 13 prostitutes between 1996 and 1998.

Scottish serial killer Robert Black attacks four young girls aged 5 to 11 between 1981 and 1986.

Bobby Joe Long abducts, sexually assaults and murders at least 10 women in the Tampa Bay area.

Mark Hobson killed four people in North Yorkshire, England in July 2004. Hobson committed his first 2 murders within 6 days of each other. He is currently serving a whole life sentence.

Bob Berdella kidnaps, rapes, tortures and murders at least six men in Kansas City, Missouri.

Danny Rolling murdered five college students in Gainesville, Florida, in August 1990.

David Heiss' obsession with Joanna Witton ends with him stabbing her boyfriend 86 times.

Dennis Rader, known to the World as the BTK Killer, killed 10 people, including young children between 1974 and 1991 in Wichita, Kansas USA. Rader's preferred method of murder was to bind, torture and then kill.

In Cumbria, 2010 taxi driver Derek Bird took his gun and, in less than 24 hours, shot dead 12 people and injured 11 more. The callous killer only stopped when he had run out of ammunition, finally turning the gun on himself.

30 year old Trevor Hardy known as 'The Beast of Manchester' killed three teenage girls in a series of brutal attacks in the mid to late 1970's. He was given three life sentences and was one of Britain's longest serving prisoners.

Christopher Halliwell, a 47 year old cab-driver, strangled a twenty year old woman and evaded justice for 8 years until his arrest for killing another young female. He finally got a whole life sentence in 2016.

44 year serial killer John Cooper known as 'The Bullseye Killer', killed four people between 1983 and 1996, he was given four life sentences.

32 year old Vincent Tabak strangled his neighbour 25 year Joanna Yeates to death in her own flat in December 2010. In 2011 he was given a life sentence, with a minimum of 20 years.