Ernst Kaltenbrunner was a life-long fanatical Nazi. He had much to do with developing the Mauthausen KZ camp and visited it frequently. He agreed with Himmler on the establishment of gas-chambers for execution 1942, became head of the security police 1943, and sent millions of Jews and political suspects to their deaths in the concentration camps. He was also responsible for orders sanctioning the murder of prisoners of war. Ernst Kaltenbrunner was captured by U.S. troops on May 15, 1945 and was indicted for war crimes by the International Military Tribunal at Nuremburg and sentenced to death. He was hanged on October 16, 1946.