Before WW2 Carl Clauberg was a well-respected Professor and gynaecological researcher with a successful medical career. But Clauberg, one of the most respected individuals in the German medical society, transformed at Auschwitz from a healer into a systematic killer. After the war Carl Clauberg was put to trial in the Soviet Union and sentenced to 25 years. 7 years later, he was pardoned under the "returnee" arrangement between Bonn and Moscow and went back to West Germany. Upon returning he held a press conference and boasted of his scientific work at Auschwitz. After survivor groups protested, Clauberg was finally arrested in 1955 but died in August 1957, shortly before his trial should have started.