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.
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.
Pedro Alonso Lopez is a Colombian serial killer who raped and killed up to 300 girls in South America. He was called the monster by the Andes after leading the police to a mass grave of 53 girls in 1980.
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.