Looks like alot of those "Freedom Fighters"(mercenaries) are behind it.
"According to lawyers for some of the soldiers, they claimed to be acting in part under the instruction of mercenary interrogators hired by the Pentagon."
"Lawyers for the soldiers argue they are being made scapegoats for a rogue military prison system in which mercenaries give orders without legal accountability."
"One civilian contractor was accused of raping a young male prisoner but has not been charged because military law has no jurisdiction over him."
"But this is the first time the privatisation of interrogation and intelligence-gathering has come to light. The investigation names two US contractors, CACI International Inc and the Titan Corporation, for their involvement in Abu Ghraib.Titan, based in San Diego, describes itself as a "a leading provider of comprehensive information and communications products, solutions and services for national security". It recently won a big contract for providing translation services to the US army."