In 2002, concerned about the treatment of prisoners at Guantánamo Bay, Cuba, FBI agents created a "war-crimes file" to document accusations against U.S. military personnel, a Justice Department report disclosed Tuesday. The Justice Department inspector general's report, which took four years to complete, provides the fullest account to date of dissent and confusion over the interrogation tactics used by the military and the CIA. In one of several previously undisclosed episodes, the report found that U.S. military interrogators appeared to have collaborated with visiting Chinese officials at Guantánamo Bay to disrupt the sleep of Chinese Muslims held there, waking them up every 15 minutes the night before their interviews by the Chinese. The report describes what one official called "trench warfare" between the FBI and the military over the methods used on detainees in Guantánamo Bay, Afghanistan and Iraq. CBS News: Report: CIA Pushed Torture Envelope.