Antun Najžer
Antun Najžer, also known by the hypocorism Ante Najzer, was a Croatian physician and member of the fascist Ustaše movement who served as the commander of the Sisak children's concentration camp in the Independent State of Croatia during World War II. He was dubbed the "Croatian Mengele" by survivors because of conducting medical experiments on his victims. For these crimes, in September 1946 he was sentenced to execution by a firing squad.