Washington, June 7 (RHC)-- The Guardian reports that the judge overseeing the military tribunal at the U.S. prison on Guantánamo "effectively conspired" with prosecutors to destroy evidence related to the defense of Khalid Sheikh Mohammed, the accused architect of the 9/11 attacks.

A court document alleges the judge, Army Colonel James Pohl, worked secretly in concert with prosecutors to approve the destruction of evidence and prevent Mohammed’s defense team from learning about the move.  Legal scholar Karen Greenberg told The Guardian: "This may well be the straw that breaks the camel’s back in underscoring the inviability of the military commissions."

The U.S. military prison is located on the occupied-territory of the Guantanamo Naval Base in eastern Cuba.  The return of the land and closing the U.S. prison are key demands of Cuba in negotiations with the United States toward the normalization of relations between the two countries.