New evidence that the physical abuse of detainees in Iraq and at Guantanamo Bay was authorised at the top of the Bush administration will emerge in Washington this week, adding further to pressure on the White House.
The Telegraph understands that four confidential Red Cross documents implicating senior Pentagon civilians in the Abu Ghraib scandal have been passed to an American television network, which is preparing to make them public shortly.
According to lawyers familiar with the Red Cross reports, they will contradict previous testimony by senior Pentagon officials who have claimed that the abuse in the Abu Ghraib prison was an isolated incident.
"There are some extremely damaging documents around, which link senior figures to the abuses," said Scott Horton, the former chairman of the New York Bar Association, who has been advising Pentagon lawyers unhappy at the administration's approach. "The biggest bombs in this case have yet to be dropped."