Physicians for Human Rights who examined 11 former detainees from Abu Ghraib prison in Iraq and at Guantanamo Bay say they "uncovered medical evidence of torture, including beatings, electric shock, sleep deprivation, sexual humiliation, sodomy and scores of other abuses."
The detainees were never charged with crimes.
"We found clear physical and psychological evidence of torture and abuse, often causing lasting suffering," said Dr. Allen Keller, a medical evaluator for the study.
The report is prefaced by retired U.S. Major Gen. Antonio Taguba, who led the Army's investigation into the Abu Ghraib prisoner abuse scandal in 2003.
"There is no longer any doubt that the current administration committed war crimes," Taguba says. "The only question is whether those who ordered torture will be held to account."