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.

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.

Joachim Kroll was a German cannibal and serial killer. He was convicted of eight murders despite admitting fourteen murders. Kroll started his series of murders in 1955 after his mother died. He worked as a toilet man for Mannesmann, later for Thyssen-Krupp.

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.

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.

American serial killer Gary Ridgway has been convicted of 48 murders. However, he stood twice as many. He murdered countless women and girls in Washington State. Most of the victims were prostitutes.

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.

American serial killer Dennis Rader, also known as BTK Killer (English for Bind, Torture and Kill), killed at least eight people in the period from 1974 to 1991.

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.

"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.

Anatoly Onoprienko was a 52-time serial killer from Ukraine. He started his murder series at the age of 19. Most of the time he went to abandoned houses and killed the whole family.

Serial killer Earle Leonard Nelson was born on May 12, 1897 and was hanged in Winnipeg on January 13, 1928. He escaped from Napa State Hospital several times. After his last escape, he began his series of murders in 1926.

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.

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.

Peter Sutcliffe had raided and raped at least 20 women, including at least 13 women, in the West and South Yorkshire counties of Leeds and Bradford in 1975.

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.

Randy Steven Kraft is an American serial killer who mainly took young men on the freeway in the early 1970s and then killed them.

Luis Garavito is a rapist and serial killer from Colombia. He was born on January 25, 1957. At the age of 35, he started talking to small children, luring them away, and then raping and killing them. He remained undetected for seven years.

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.

Dennis Nilsen is a necrophilic serial killer who killed at least 15 men in London between 1978 and 1983. His nickname is also the Muswell Hill Murderer or the Kindly Killer.

Henry Howard Holmes's real name Herman Webster Mudgett was born on May 16, 1860 and was executed on May 7, 1896 in Philadelphia, Pennsylvania. The exact number of its victims is not known, it is assumed that up to 200 victims.

Peter Kürten, also called Vampire from Düsseldorf, was a multiple serial killer at the beginning of the last century. He committed a series of sexual crimes, robberies and murders of children and adults.

Karl Großmann was born on December 13, 1863 in Neuruppin and died on July 5, 1922 in Berlin. The butcher of Berlin mostly invited young women to his house and killed them.