This may have been the same guy.
Matter of fact, it wasn't Chano Zuniga. Chano was a crispy critter burned from head to toe. He was a walking scar tissue.
This half-face man was of the African American persuasion.
Better to use a .22, I think. Let it rattle around inside your brain pan for a while.
That usually does the trick.
I recommend a higher caliber, had a classmate in HS use a .22 - barely made it into the skull and then just worked around the outside. Big personality change, but otherwise survived and was back at school the next fall.