Germany's Alfred Krupp, winner of a bronze medal in the 8-metre sailing at the 1936 Olympics in Berlin, was convicted as a war criminal as the family company he owned was a key supplier of weapons and materiel to the Nazi regime during World War Two. Krupp's wartime employment of slave labour, resulted in him appearing at the Nuremberg trials in 1947-1948, following which he served three years in prison. Krupp worked closely with the SS, which controlled the concentration camps from which slave labour was obtained.