After reading the article it's a tuff call.. but I would have to keep it simple. The kid was in this man's garage that late at night. The fact that they set a trap to catch the burglar who had already stolen items for their garage is irrelevant to me. If the kid wasn't in his garage he would not have been shot. I personally would not have opened fire into my house like that but that's just me. And with out seeing my target I would not shoot.
But I think the fact they made comments about setting the trap to shoot someone will be what gets him a murder charge.