A Lt. Col. admitted to using a death threat and firing his pistol next to the head of a detainee (an uncooperative Iraqi police officer suspected of being part of a plot to assassinate U.S. troops, including the Lt. Col) during an interrogation.  Four enlisted soldiers and a female civilian interpreter punched and kicked the detainee in the torso and right leg "numerous times while they were interrogating him."  Statements in the file indicate that the interrogation lasted for approximately an hour and that during this period a soldier (or the translator) brandished a knife at the detainee and told him that she would cut him with it.  Soldiers were all from 2-20th Field Artillery Bn., 4th Inf. Div.