All is clear now; it's the we love death more than you love life "defense":

At the start of the second day of the trial, on Wednesday, Major Hasan’s former lead Army defense lawyer, who sits by his side in the courtroom as his standby counsel, told the judge that Major Hasan’s goal was to receive a death sentence, and that helping him achieve that goal violated his ethical obligations.

“His goal is to remove impediments or obstacles to the death penalty and is in fact encouraging or working toward the death penalty,” said the lawyer, Lt. Col. Kris R. Poppe.

excerpt from

Lawyer Says Fort Hood Defendant’s Goal Is Death
By Manny Fernandez, New York Times, August 7/8, 2013

In Testimony, Witnesses Relive Horror of Fort Hood Attack

By Manny Fernandez, New York Times, August 10/11, 2013

KILLEEN, Tex. — [....]

Witnesses said that after wounding soldiers once or twice, he shot them again as they lay on the floor or crouched behind partitions. Some he shot in the back. Staff Sgt. Alonzo M. Lunsford Jr., the first victim who testified Tuesday, told of being shot at as he lay bleeding outside and was being given first aid. In his semiautomatic handgun, Major Hasan used 10-round magazine extensions that allowed him to shoot 30 rounds at a time instead of just 20. Two laser sights under the barrel helped him target soldiers in uniform and avoid civilians in scrubs or street clothes. [....]

[....] And she heard a woman’s voice: “Please don’t, please don’t, my baby, my baby.”

The woman was Pvt. Francheska Velez, 21, known as Checka by her friends, who was returning home from Iraq because she was pregnant with her first child. Private Velez was one of the 13 victims who died. All but one of them were uniformed soldiers. All were unarmed. Some carried their medical records in their hands. One of them was found seated upright in his chair in Station 13 — “white as a sheet, as if he hadn’t even moved,” recalled one of Sergeant Guerra’s office-mates, Sgt. Monique Archuletta. [....]

Sergeant Manning watched Major Hasan shoot from a right-to-left motion, “firing as fast as he can acquire targets,” he said Friday. He was first shot in the chest. After he went down, he was shot in the thigh as he tried to crawl away. Then he was shot a third, fourth, fifth and sixth time. [....]