Donald Ryder is a retired major general of the United States Army who served as United States Army Provost Marshal General from 2003 to 2006.

In 2003, Ryder conducted an inquiry into the abuse of prisoners in Iraq, cited in the Taguba Report.

[3] General Miller had urged closer cooperation between guards and interrogators.

Secretary of Defense Donald Rumsfeld's response to the public release of the news of the Abu Ghraib torture and prisoner abuse was to ignore Ryder and Taguba's recommendations and appoint General Miller to take over the direction of the prison facilities in Iraq.

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