Usually, but not always, events such as car accidents and this result from TWO individuals doing something wrong concomitantly.
Here, I think they were both at fault; however, the kid was the aggressor, Levin was in his own home minding his own business. Ultimately I agree with you: the kid should not have been out after midnight annoying people--you never know what frightened people will do to protect themselves.
Of course we need more facts, but I think the guy doesn't do time based on what I've read so far.
From the little info we have all I know is a kid is dead because he was an idiot. I also liked the little tidbit in the story about how now that he was 16 he could get his drivers license. Lets see yesterday he was stupid enough to bother innocent homeowners by shudder....knocking and running but today he was not stupid enough to be a new driver. Something wrong with that picture. I am not niave and I know kids do stupid things but to play the boy up as a saint now after his stupid pranks got him killed is beyond this conservative parent.