he has already served three times in iraq, which means he's spent about half of the last eight years or so away from his own family, deployed in the war zones. the u.s. military is certain he acted alone, but it was methodical. he left the base, killed women and children and men in that village, and then returned to the base. apparently, he had two guns, an automatic weapon and a pistol. he returned to the base. he didn't exactly turn himself in. but they realized he had been gone, and when he came back he did not struggle and they continued to question him. martha raddatz, abc news, washington. >> and he came from that base out in washington, the lewis-mccord base, where a couple of years ago four soldiers were taking part in the killings of -- those thrill killings of three afghan civilians. you just have to wonder about his state of mind. this was his fourth deployment. >> and you also have to wonder how much louder the voices telling, you know, president