Duty of care

This article from Le Monde relates two harrowing accounts of prisoners held in Iraq.
The first story tells of a man who had been in the bomb disposal squad of the Iraqi army during his military service but had absconded before the war started. He went to Bagdad after the Americans had taken control of the city to arrange his wedding, but found a car bomb outside his hotel. He reported it to a member of the police, who in turn denounced him as a terrorist sympathiser to the U.S. army.
Despite any evidence, he was then transferred to Abu Ghraib prison where he was starved, hooded, shaved, beaten, held in stress positions and pissed on. One of the prisoners had his sister raped in front of him. On his release he had to sign papers recognising that U.S. forces' "duty of care" towards him had ended.