Julius Dettmann

Julius Dettmann (January 23, 1894 – July 25, 1945) was a German Schutzstaffel (SS) officer in the Sicherheitsdienst (Security Service; SD).

Dettman was a member of the Nazi Party (NSDAP) and his Party number was 722,240. Thereafter, he joined the Schutzstaffel (SS); his SS number was 414,783. He was attached to Section IVB4 or the Gestapo, after having served in Poland and Russia. He was stationed in Amsterdam during the German occupation of the Netherlands. He was promoted to SS-Obersturmführer (lieutenant) on November 9, 1942. On August 4, 1944, he received a phone call reporting that there were Jews hidden on the premises at 263 Prinsengracht in Amsterdam. The people in question were Anne Frank, her parents, sister, and four others. He immediately dispatched a squad led by SS-Oberscharführer (staff sergeant) Karl Silberbauer, telling Silberbauer that the call had come from "a reliable source". Silberbauer and his contingent of NSB plain-clothes officers raided the building and arrested the eight in hiding who, after questioning at SD headquarters, were deported to the Westerbork transit camp and from there to the Auschwitz concentration camp.