After his promotion to Obersturmführer (first lieutenant) he participated in sabotage and terrorist actions against the Danish population from December 1943 until autumn 1944, as the leader of the "Peter Group", including the murder of a Lutheran pastor Kaj Munk.[11] Later leadership passed to SS-Hauptsturmführer Otto Alexander Friedrich Schwerdt (SS-Jagdverbände). Circa November 1944, Naujocks turned himself over to American forces, who subsequently placed him in detention as a possible war criminal by the end of the war.[2]