Franz Stangl was the Nazi commandant of the Treblinka and Sobibor death camps in Poland. He was responsible for the extermination of approximately 900,000 men, women and children. At the end of the war, he escaped to Italy where he joined a "rat-line" organized by Vatican officials. From there, he disappeared. Simon Wiesenthal, a survivor of the Holocaust, vowed to track down some of the Nazi monsters who had put him and so many other Jews through hell. After years of searching, Wiesenthal tracked Stangl down in Brazil. He was extradited to West Germany where he was put on trial for the deaths of 900,000 people. Found guilty in 1970, Stangl was sentenced to life imprisonment and died of heart failure in Dusseldorf prison in 1971.