I don't mean to be rude, Greg, but the irony is killing me. You state how the mainstream media hasn't tried to spin this as "video games kill kids", in face of the fact that they usually would, but then you yourself spin the story as such.
Here are the facts:
1. Young kid and adult friend play video game together.
2. Later that night, adult stabs kid.
3. There was no evidence implicating that (1) lead to (2).
So why does your title say he was killed while playing? In reality, he was killed afterward, and it's not even clear that it had anything to do with the game.
So why try to spin this as "game results in murder"?