Münch was nicknamed "The Good Man of Auschwitz" for his refusal to assist in the mass murders there. He developed many elaborate ruses to keep inmates alive. He was the only person acquitted of war crimes at the 1947 Auschwitz trial in Kraków, where many inmates testified in his favour. After the war and the trial, he returned to Germany and worked as a practicing physician in Roßhaupten in Bavaria. While suffering from Alzheimer's in old age, he made several public remarks that appeared to support Nazi ideology, and was tried for inciting racial hatred and similar charges. Münch was never sentenced, as all courts ruled that he was not of sound mind. He died in 2001.