hello i m don lemmon. does bob durham think that the bobby bales he knows could be capable of this action? reporter: he says he absolutely cannot fathom how this possibly could have happened. he said the man he knew was a caring young man who he knew through adulthood and when he worked in the business world and then went to the military after 9/11. he said that if something somehow caused him to snap, for example, no one knows what happened, he said if doctors are able to find out and get him to understand in actuality that children and women had been killed, that he doesn t think his friend, sergeant bales, would ever be able to come to grips with that. don? the last time he spoke with him was back in december. it s been fairly recently, correct? reporter: that s right. he called him because sergeant bales called mr. durham from afghanistan to console mr. durham about the loss of his own father. and so he felt very badly about it. he said they still have a very sp