Three categories of prisoners were imprisoned at Abu Ghraib by the U.S. military. These were "common criminals", individuals suspected of being leaders of the insurgency, and individuals suspected of committing crimes against the occupational force led by the U.S. Although most prisoners lived in tents in the yard, the abuses took place inside cell blocks 1a and 1b. The 800th Military Police Brigade, from Uniondale, New York, was responsible for running the prison. The brigade was commanded by Brigadier General Janis Karpinski, who was in charge of all of the U.S.-run prisons in Iraq. She did not have previous experience in running a prison. The individuals who committed abuses at the prison were members of the 372nd Military Police Company, which was a constituent of the 320th Military Police Battalion, which was overseen by Karpinski's Brigade headquarters.