I think the bullet entered the mouth, took ot the front teeth and exited the back of his neck, behind the jaw as I originally surmised.Are we talking about this pic?View attachment 8461605
If so, zooming in to the ear, it doesn't look big enough to be scars, and its too long. It looks like blood. And the back of the jaw/ear absolutely looks like an exit wound, I don't know who said it before that there is no exit wound from this. All the blood running down his face likely came from that wound.
You can see what is probably the edge of a massive exit hole below the ear. And as you say, the blood is coming from that exit wound.
Why is his ear chewed on? It looks like Evander Hollyfield's.