27. Shirō Ishii
Ishii, the next one on our list of most evil people in history was a medical doctor and biologist who loved experimenting with human beings, and everything he did was justified by the explanation that he is trying to find the best way to defeat Japan’s wartime enemies and his torture experiments were studied and recorded. Usually, Chinese prisoners were the main victims, but they were not the only ones. He would cut their body parts and save them within the freezers and he was interested in the wider cross section of human guinea pigs. Although thousands were tormented and died during these experiments, he was never in jail, since he was granted immunity by the American Occupation Authorities.
