A new book says Justice Department prosecutors were stunned to learn three years ago that the U.S. military had secretly tape recorded incriminating comments that alleged 9/11 mastermind Khalid Sheikhs Mohammed made to fellow detainees during daily prison yard conversations but was not planning to use them at military tribunals.
In "Kill or Capture: The War On Terror And The Soul Of The Obama Presidency," journalist Daniel Klaidman says Mohammed was caught on tape boasting to other detainees about the 9/11 attacks.
According to the book, Mohammed mentioned specific pieces of evidence, documents and computer files that could be tied directly to him through his voluntary statements to other detainees at the military detention facility in Guantanamo Bay.
© Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.