A military judge on Friday ruled that alleged 9/11 mastermind Khalid Sheikh Mohammed’s 2007 confession to FBI agents was involuntary, excluding the statements from evidence in the long-delayed prosecution stemming from the 2001 terrorist attacks.

Air Force Lt. Col. Michael Schrama, the judge overseeing the military commission at Guantanamo Bay, also ruled that statements Mohammed made during subsequent FBI interrogations in 2007 were inadmissible.