Henri Désiré Landru (12 April 1869 – 25 February 1922) was a French serial killer and real-life "Bluebeard". Landru stood trial on 11 counts of murder in November 1921. He was convicted on all counts, sentenced to death, and guillotined three months later in Versailles.
Ted Bundy, before anyone knew of him, accidentally photographed in his car while stalking victims in 1974
Marc Dutroux- Belguim-Convicted of kidnapping, torturing and sexually abusing six girls during 1995 & 6, ranging in age from 8 to 19, four of whom he murdered; also tortured and murdered his accomplice Bernard Weinstein.