Ernst Kaltenbrunner
Hamann left Lithuania in October 1941 and continued his SS career. In 1942, Hamann participated in Operation Zeppelin, a scheme to recruit Soviet POWs for espionage behind Russian lines. From 1943 he worked at Amt IV of RSHA (Gestapo). He was involved in apprehending and executing suspected members of the 20 July plot to assassinate Hitler. He was appointed aide to Ernst Kaltenbrunner, director of the Reich Security Main Office. After the war, Hamann committed suicide.