lodged into his skull...

Depending on the kind of tire iron we're dealing with, that seems hard to do.
There are a few options I haven't seen commented yet: illegal immigrant, well-connected politician or fed, or an otherwise clear self-defense case against the kid (gone overboard?) (maybe read the article first, me) something intended for the driver of the car he was in.

lodged into his skull...

Depending on the kind of tire iron we're dealing with, that seems hard to do.
There are a few options I haven't seen commented yet: illegal immigrant, well-connected politician or fed, or an otherwise clear self-defense case against the kid (gone overboard?).