all straight ahead in the newsroom. u.s. military investigators believe the soldier charged with killing at least 16 afghan civilians in kandahar returned to his base between killings. army officials now believe staff sergeant robert bales killed people in one nearby village, came back to his post, left again and killed people in another village. nine children are among the victims. this timeline is reportedly based on interviews conducted at the scene. barbara starr is on the phone with us now. barbara, this news that sergeant bales probably made two trips in that killing spree, why is that a factor into what happened, how investigators are trying to piece together what happened and how? reporter: well, you know, fredricka, one of the things investigators want to know is, did anybody see him come and go. did anybody know that he might have been acting outside normal military behavior. if he came back, indeed as they now suspect, was he seen, did he talk to anybody, wha