Franz Paul Stangl (1908 愺 1971) Austrian-born police officer and commandant of the Nazi extermination camps Sobibor and Treblinka. Stangl, an employee of the T-4 Euthanasia Program and an SS commander in Nazi Germany, became commandant of the camps during the Operation Reinhard phase of the Holocaust. He was arrested in Brazil in 1967, extradited to West Germany and tried for the mass murder of 1 million people. In 1970, he was found guilty and sentenced to the maximum penalty, life imprisonment. He died of heart failure six months later.