A Fort Hood official says the unstable mental condition of the gunman who killed three people and wounded 16 others at the Texas military post is believed to be an underlying cause of the attack.
Fort Hood's senior officer, Lt. Gen. Mark Milley, said Thursday that there's "very strong evidence" that Spc. Ivan Lopez had a medical history indicating an unstable psychological condition and that it was believed to a "fundamental underlying cause" in yesterday's shooting.
Investigators have been searching Lopez's home. A spokesman says they've also been questioning his wife.
A top Army official says the soldier had seen a psychiatrist last month, and didn't show any signs of being a threat to himself or others. Army Secretary John McHugh adds that there are no apparent ties to extremist groups.