This is a true sad incident. I am sure the guilt this man went through after killing his friend was just too much for him. And that's sad in itself. One can not stress the importance of hunter safety.

When I was teaching a young man to hunt, I pounded it into him over and over... know your target and what is behind it. Yet I too was guilty of the same thing, not knowing what was behind my target. While I did not kill a human, I did kill a second deer. And while my friends thought that was pretty cool, it has bothered me terribly for a long time.