He was assigned to the camp's Erkennungsdienst, which photographed events in the camp, including medical experiments, and created portraits for the inmates' files.[5] Brasse estimated that he took 40,000 to 50,000 "identity pictures" from 1940 until 1945, before being moved to another concentration camp in Austria, where he was liberated by the American forces in May 1945.[6][3][4][5]