Karl and Ilse Koch. Karl was Commandant of Sachsenhausen Concentration Camp, then moved to Buchenwald. and finally to Majdanek. He was executed by the Nazis for theft during the war. His wife, Isle, "Bitch of Buchenwald", is infamous for her collection of items made from the tanned skin of inmates. She rode through the camps selecting prisoners whose tattoos she fancied, had them killed, and used the skin for lampshades, purses, and other items. She committed suicide in prison in 1967.