Alexander Pichushkin is a Russian serial killer from Moscow. In 1992 the then 18-year-old student began planning the so-called checkerboard murders together with his friend and classmate Mikhail Odiichuk.

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.

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.

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.

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.

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.

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.