Donald Henry Gaskins alias Pee Wee was often raped by men in his youth. When Gaskins was raped again by a fellow inmate at the age of 20, he cut his throat - his first victim.

Yang Xinhai was born on July 29, 1968. As the son of a poor farming family, he was introverted and tenderly strung as the youngest child. At school he had to provide himself with food, which was always a challenge without money. When he was 17, he dropped out of school to join migrant workers.

Rodney James Alcala is an American serial killer who started his murder in 1971. He has been waiting for his death sentence in a California prison since 2010.

Friedrich Heinrich Karl Haarmann was a German serial killer who was born in Hanover on October 25, 1879 and executed on April 15, 1925 with a guillotine.

"Kiss my ass.": Those were the last words of serial killer John Wayne Gacy. He was sentenced to death twelve times for 33 murders of young men and children - world record. The actual number of murder victims was taken to his grave by one of the most notorious serial killers of all time. He died from a lethal injection on May 10, 1994 at the Stateville Correction Center.

In 2006, serial killer Ronald Dominique admitted to having committed 23 murders and numerous rapes in the federal state seed Lousiana. His victims were young men.

Daniel Camargo Barbosa was a sadist and serial killer from Colombia. He killed about 150 young girls in Colombia and Ecuador in the 1970s and 1980s.

The French serial killer Joseph Vacher lived from 1868 to 1898. The police assume that he had at least 11 people on his conscience. Vacher's victims were mostly young agricultural workers. It didn't matter whether they were female or male.

Serial killer William Bonin killed at least 21 people in 13 months. He mostly dumped his victims on highways, hence the nickname The Freeway Killer.

Mexican-born Juan Corona employed seasonal workers on a California farm in the 1970s. He also gave them a place to sleep on the site where 25 bodies were later discovered. He was sentenced to 25 life sentences with no prospect of pardon.

Carl Panzram (AKA: Jeff Rhoades, John O’Leary) was born on June 28, 1891 in Minnesota and executed on September 5, 1930 in Leavenworth, Kansas Federal Prison.

One of the most popular serial killers in post-war history was Jeffrey Dahmer. Born the eldest son of Joyce Annett and Lionel Herbert Dahmer, he started his first murder at the age of 18. In the summer of 1978, his parents' house was available to him alone. One day he brought hitchhiker Stephen Hicks home for a beer.

Serhiy Tkach was a former police inspector from Ukraine who became a serial killer throughout his career. He admitted to having committed up to 100 murders of young girls.