Boing Boing: Medical professionals complicit in Abu Ghraib torture, says bioethicist: ‘In one example, soldiers tied a beaten detainee to the top of his cell door and gagged him. The death certificate indicated that he died of “natural causes . . . during his sleep.” After news media coverage, the Pentagon revised the certificate to say that the death was a “homicide” caused by “blunt force injuries and asphyxia.”‘
There’s more on this on New Scientist.