8. Dr. Josef Mengele
Mengele, looking as innocent as a child can be.
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Seeming like an unremarkable kid who’d live a mediocre life, Josef Mengele grew up to prove everyone wrong. Known as one of the most evil people to walk the earth, Dr. Mengele was a physician with the Nazis who conducted unimaginable cruel experiments on the concentration camp victims.

Dr. Josef Mengele became one of the most cruel people the world has seen.
Dr. Josef Mengele became one of the most cruel people the world has seen.