KSM confessed

According to a new book, 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.