Someone in comments stated that the cop that tried to stop it got the worst of it. That doesn't appear to be true, it looks like he got away. There was a second bald cop and I can't tell if he was trying to protect the guy from the younger officer(they are cops, right?) or not.
That would really freaking suck if it is the case. Imagine being one of the two that tried to protect the man from the others, only to get the crap beat out of you as a thanks.