agent denahan had his theories. someone that had a personal grievance against judge salas herself. we also, though, had to consider, could it be someone that was targeting her husband, mark? and lastly, and even though it was unlikely, could someone have been targeting danny himself? andrea canning (voiceover): shortly after the shooting, the fbi paid a visit to danny's good friends, brothers casley and calson goodwill. we basically sat there and spoke with them for about 30 minutes to an hour. did they ask you if danny had any enemies? yes. someone who might have wanted to hurt him? yeah, but i told them, i mean, there was no one, even when i think now, there's no one that ever had any resentment towards him. andrea canning (voiceover): in fact, they say it was quite the opposite. why daniel, out of all people? one of the sweetest kids i've ever met in my entire-- the nicest, hard-working, you know, just to this day. andrea canning (voiceover): the brothers couldn't believe that anyone would want to kill their frie