Hasan has made no attempt to prove his innocence or challenge the narrative of military prosecutors, who showed evidence of Hasan using his laptop to run Internet searches for "jihad" and find articles about calls to attack Americans in the days and even hours before the shooting.
He seldom spoke during the trial and questioned only three of the nearly 90 witnesses called by prosecutors. Many of those witnesses were survivors of the attack who recalled hearing a shout of "Allahu Akbar!" Arabic for "God is great!" inside a crowded medical building before Hasan opened fire using a laser-sighted handgun.
During his brief opening statement, he said evidence would show he was the shooter, and he said he'd "switched sides."
The American-born Muslim suggested before trial that he wanted to argue the killings were in defense of Taliban fighters in Afghanistan. A judge rejected that strategy.
Hasan began the trial signaling that he would call on just two people to testify one a mitigation expert in capital murder cases and the other a California professor of psychology and religion.
But Hasan on Tuesday indicated to the judge, Col. Tara Osborn, that he would now call neither witness. That left Osborn raising her own skepticism that Hasan would seize his last chance before the case is sent to a jury of 13 military officers.