This is called Graphic: Abu Ghraib pictures and video.
By Jerry White in the USA:
Military officers testify that US soldiers murdered Iraqi detainees
29 August 2008
Testimony presented to a US Army hearing in Germany this week detailed how three US noncommissioned officers executed four bound and blindfolded Iraqi detainees in Baghdad in April 2007. The four men—whose names have been withheld by the US military—were allegedly murdered and their bodies dumped on the banks of a canal.
Two noncommissioned officers— Sergeant First Class Joseph P. Mayo, the platoon sergeant, and Sergeant Michael P. Leahy Jr., Company D’s senior medic and acting squad leader, confessed to the killings and gave accounts of the event in signed statements to Army investigators in January.
The statements, obtained by the New York Times, described how each of the two soldiers killed one of the Iraqi detainees with a pistol shot to the back of the head, following the orders of First Sergeant John E. Hatley. Hatley shot the two other Iraqi men, the soldiers said, before ordering them to remove the bloody blindfolds and plastics handcuffs and shove the bodies into the canal.