Where's the formal statement? The interview in the probable cause statement was informal and conducted while the kid was receiving medical treatment.I think the kid is full of shit.
In his formal statement, he said he was shot in the head and while he was laying on the ground, the old man shot him a second time in the arm. Think about that.
I'm not sure what point you're trying to make. Immediate effects of being shot in the head are extremely variable and run the full spectrum. There was that one cop who was shot in the head with a 223 round, stayed in the fight (albeit confused). I'll see if I can find it.