(CNN) — The Army psychiatrist defending himself against charges that he killed 13 people in a shooting rampage at Fort Hood, Texas, rested his case Wednesday without calling a single witness.
Maj. Nidal Hasan faces a possible death sentence, if convicted 13 counts of murder and 32 counts of attempted murder in connection with the November 5, 2009, attack at a deployment processing center for soldiers heading to Afghanistan and Iraq.
Closing arguments in the court-martial are expected to follow shortly, with Hasan set to make a statement to the military jury of 13 officers who will decide his fate.
Military prosecutors called 89 witnesses and submitted more than 700 pieces of evidence before resting their case, hoping to show that the American-born Muslim had undergone what they described as a progressive radicalization.
They have argued to the jury that Hasan, who was scheduled to deploy to Afghanistan, did not want to fight against other Muslims and believed he had a jihad duty to kill as many soldiers as possible.
Over the course of 11 days, prosecution witnesses painted a horrific picture of the shooting rampage that began inside the deployment center, with a number recounting how the gunman rose from a chair, shouted "Allahu Akbar" -- Arabic for "God is the greatest" -- and fired more than 146 rounds in the room.
Prosecution witnesses called Tuesday described the final minutes of the attack, and a police shootout that ended with the gunman shooting a police officer before he was shot. Hasan was paralyzed for the chest down.
The final witness called by the prosecution, Dr. Tonya Kozminski, testified about what Hasan told her would happen to the Army if he were deployed.
"The last thing he said ... 'They will pay," Kozminski said.