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David Parker Ray, AKA the “Toy-Box Killer,” may have murdered up to 60 women in a trailer he’d rigged as a sadomasochistic torture chamber. But he died before ever facing murder charges.

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“In 1993, Robert Thompson and Jon Venables beat 2-year-old James Bulger to death. Thompson and Venables were 10 at the time.”

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The five serial killers cataloged in this article are from Ukraine, the United States, and Japan. When they committed their crimes, they were 19, 48, 32 and 60 years old. Their murders were characterized by, among other practices, bludgeoning with hammers, mutilation, “skin suits,” rape, cannibalization, torture, video taping and necrophilia.