The suspect in the shooting that left at least 12 dead and 31 wounded at Fort Hood recently caught the attention of authorities after making online posts about suicide bombings.
Federal law enforcement are trying to verify if Maj. Nidal Malik Hasan made the Internet comments, which talked about suicide bombings and other threats.
One post parallels suicide bombers to a soldier who threw himself on a grenade to save the lives of his comrades.
"To say that this soldier committed suicide is inappropriate. Its more appropriate to say he is a brave hero that sacrificed his life for a more noble cause," said the Internet posting. "Scholars have paralled (sic) this to suicide bombers whose intention, by sacrificing their lives, is to help save Muslims by killing enemy soldiers."
Click play for response to Thursday's deadly shooting with CBN News Military Reporter Chuck Holton.
Hasan-- first said to have been killed-- was wounded after opening fire at about 1:30 p.m. in Fort Hood's "soldier readiness facility"-- the area troops are sent to "ready" for deployment.
He's now in stable condition under military guard. Two other suspects are also in custody and all those believed to be involved so far are soldiers, spokesman Lt. Gen. Bob Cone said.
Hasan, 39, is an Army psychiatrist who'd previously done a fellowship at Walter Reed Army Medical Center in Washington, D.C.
Texas Sen. Kay Bailey said she'd learned that he'd recently found out he was about to be deployed and "appeared to be upset." Retired Army Col. Terry Lee also told reporters that Hasan had expressed his opposition to the war and wanted President Obama to withdraw troops from Iraq and Afghanistan.
Fort Hood was locked down as a result of the shooting and other bases increased security. Several nearby schools were also temporarily locked down.
Hasan was born in Virginia and received a bachelor's degree in biochemistry from Virginia Tech University.
He received his medical degree from the military's Uniformed Services University of the Health Sciences in Bethesda, Md.