let s get to takoma, washington where dan simon is now. reporter: of course the focus is trying to see if there were clues or warning signs that may have caused this army soldier robert bales to carry out this unthinkable rampage. right now there is a lot of speculation whether or not he suffered deep emotional problems after having been to four different battle zones, three in iraq, one in afghanistan. of course, his attorney tells cnn in 2010 he suffered a serious brain injury after his vehicle hit a roadside bomb. that attorney telling cnn that the day before the rampage took place, his client watched a fellow soldier get seriously injured. take a look. what i heard from the military lawyers who are working on this case with me, who i m very impressed with, that another soldier at this base was brutally attacked the day before this incident and had his leg shot off right in front of my client. reporter: the military moved bales family. he s a father of two children