World's Most Evil Killers

Serial killer, kidnapper, rapist, and burglar Ted Bundy confessed to committing 30 horrific murders in seven states between 1974 and 1978, but the true number of his victims is unknown.

A look at the life and crimes of serial killer Aileen Wuornos, who claimed acts of self-defence for the murders of at least seven men in Florida from November 1989 to November 1990.

Eventually put on death row in Florida, serial killer Bobby Joe Long abducted, sexually assaulted, and murdered at least ten women in the Tampa Bay area over eight months in 1984.

A profile of Gary Ridgway, a vicious killer who is thought to have murdered over 70 teenage girls and women in a reign of terror across the Pacific Northwest that started in the 80s.

Serial killer Dennis Rader, the self-proclaimed 'BTK Killer', terrorised the state of Kansas as he brutally murdered at least ten people, including children, between 1974 and 1991.

Diane Downs was convicted of the May 1983 murder of her daughter and attempted murder of her other two children, yet she told police a stranger had shot the children while targeting her car.

Serial killer Bob Berdella, known as the 'Kansas City Butcher', kidnaps, rapes, tortures, and murders at least six men between 1984 and 1987 in Missouri, forcing his victims to endure periods of up to six weeks of captivity.

Serial killer Robert Lee Yates murdered at least 13 people in Washington State between 1975 and 1998, many of whom were vulnerable sex workers living in Spokane, and received a life sentence in 2000.

A profile of the serial killer known as 'The Gainesville Ripper', who murdered five college students in Gainesville, Florida, creating crime scenes so horrific that he inspired the movie 'Scream'.

A profile of Karol Kot, known as the 'Vampire of Kraków', who killed an 11-year-old boy and an 86-year-old woman, tried to kill many more in arson and poison attempts, and ended up being executed by the age of 21.

Criminologists, psychologists, and detectives try to understand the twisted mindset of some of the world's most dangerous serial killers.