Karpinski, who ran the prison until early 2004, said she saw a memorandum signed by Rumsfeld detailing the use of harsh interrogation methods.
"The handwritten signature was above his printed name and in the same and writing in the margin was written: "Make sure this is accomplished,"" she told Saturday's El Pais.
"The methods consisted of making prisoners stand for long periods, sleep deprivation ... playing music at full volume, having to sit in uncomfortably ... Rumsfeld authorized these specific techniques."
The fact that he was aware of, and even encouraged, these tactics will probably come as a surprise to no one. What this means for legal claims against the U.S. and Rumsfeld himself is unclear, though.