Otto Ohlendorf (4 February 1907 – 7 June 1951) was a German SS-Gruppenführer and head of the Inland-SD (responsible for intelligence and security within Germany), a section of the SD. Ohlendorf was the commanding officer of Einsatzgruppe D, which was accused of conducting mass murder in Moldova, south Ukraine, the Crimea, and, during 1942, the north Caucasus. As such, Otto Ohlendorf was a Holocaust perpetrator and mass murderer. He was convicted of and executed for war crimes committed during World War II.