Josef Mengele was a German Schutzstaffel (SS) officer and physician in Auschwitz concentration camp during World War II. He performed deadly human experiments on prisoners and was a member of the team of doctors who selected victims to be killed in the gas chambers. Arrivals deemed able to work were admitted into the camp, and those deemed unfit for labor were immediately killed in the gas chambers. With Red Army troops sweeping through Poland, Mengele was transferred 280 kilometres (170 mi) from Auschwitz to the Gross-Rosen concentration camp on 17 January 1945, just 10 days before the arrival of the Soviet forces at Auschwitz. After the war, he fled to South America where he evaded capture for the rest of his life.