My friend is a security guard, and in the dawn of Jan. 2, he accidentally shot a thief in the head ( the bullet bounced back because it was shot near the ground) which killed him instantly. And now, after the incident, my friend cannot sleep well, he feels so gulity about what happend, and sometimes he xries because of it. I feel so bad for him, he's a nice man and what happened was an accident. How can I help him cope up with it? Please help. Thank you.