Just a thought, but maybe one boy was actually hit by the car and the other boy injured in some other fashion because he was a witness?This is my first time reading about this case and a couple things jump out at me if they were hit by a vehicle I would expect someone to see a vehicle with damage to the front even if no evidence was left at the scene I don't see how a vehicle could hit someone and not have at least a dent, a cracked grill, headlight or something. Maybe they were not hit where they were found but placed there after being hit somewhere else? I don't know why the one would have different injuries than the other maybe it just had to do with how the vehicle struck them?
complete speculation, imo.