All that is fit to be read, brought to your screen.... The US armed forces are facing fresh embarrassment after it emerged that a military police officer at Guantanamo Bay suffered head injuries when he was beaten up by trainee soldiers as he posed as a detainee. Sean Baker, 37, volunteered to don an orange jumpsuit as worn by detainees on top of his uniform and crawl under a cell bunk so that an "internal reaction force" could practise subduing an unco-operative prisoner. Five soldiers were told that he was a detainee who had assaulted a sergeant. They promptly beat and choked him and slammed his head against the floor. He spent nearly a week in a naval hospital and seven weeks in the Walter Reed Army Hospital in Washington, his lawyer said. The army originally said Mr Baker's medical discharge last year was not related to his head injury but it has since acknowledged that it was connected. "It was an unfortunate accident but no one was criminally responsible for the injury he received," Major Laurie Arellano, a spokesman for the US Southern Command in Miami said. The details emerged as President George W Bush was asked about a justice department memo saying that, as commander in chief, he could authorise torture in interrogation of terrorist suspects. He said he could not recall if he saw the memo but his instructions were "to conform to US law" and to act "consistent with international treaty obligations". In a television interview in his home state, Kentucky, Mr Baker gave a graphic account of the ordeal, which he said stopped only when he managed to mutter the words: "I'm a US soldier." One of the soldiers "began to choke me and press my head down against the steel floor. After several seconds, 20 to 30 seconds, it seemed like an eternity because I couldn't breathe. "When I couldn't breathe I began to panic and I gave the code word I was supposed to give to stop the exercise which was 'red'. Somehow I got enough air. I muttered out: "I'm a US soldier." If this isn't a lesson to NEVER volunteer I don't know what is.