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Marcel Petiot was a French serial killer active during World War II, who lured victims under the pretense of helping them escape Nazi-occupied France. Instead, he murdered them and disposed of their bodies. After the war, authorities uncovered the extent of his crimes, leading to his arrest and trial. Petiot was convicted and executed by guillotine in 1946, and his case remains one of the most infamous in French criminal history.
Charles Sobhraj is a serial killer and fraudster known as "The Serpent," responsible for the murders of multiple tourists across Southeast Asia during the 1970s. He used charm and deception to gain the trust of his victims. Sobhraj was arrested multiple times over the years and spent decades in prison before being released. His case remains one of the most notorious examples of international serial killing.