The interesting thing is that he does have a bump on the top of the forehead, a very small one. But it bled. So it looks like he was beat up. But when you see his mug shot you see that he wasn’t “beat up.”
Did he fight the cops? The security camera will tell the tale. He was drunk and belligerent before the cops came along, trying to shout his way in a club he was too young to be in. Then the ABC cops pulled him out of the club doorway to talk to him.
So yeah, if you’re drunk and try and fight a cop you probably will get some scratches.
Forehead wounds usually bleed a lot.