It has been one of the most bitter legal debates during the so-called war on terror - who's to blame for torture and how many degrees of separation are needed to dodge a lawsuit?
The answer may lie in recently leaked documents, which lawyers and human rights groups hope will be a treasure trove of evidence that could prove U.S. and other coalition forces broke a cardinal rule of international law - handing over terror suspects when they had good reason to believe the detainees would be tortured.
The Pentagon has criticized the whistleblowing organization WikiLeaks for publishing nearly 400,000 U.S. military logs detailing daily carnage in Iraq since the 2003 U.S.-led invasion. In July, the same group published 77,000 secret documents on the war in Afghanistan.
The classified logs on Iraq describe detainees abused by Iraqi forces, insurgent bombings, executions and civilians shot at checkpoints by U.S. troops. They also show that, in some cases, U.S. interrogators thought detainees were speaking truthfully when they accused Iraqi security forces of abuse.
Lawyers say the once-secret logs stand apart from other reports about the Iraqi security agencies because the accounts of mistreatment are recorded - and sometimes corroborated - by the Americans themselves.