If Paulk is truly innocent -- truly, mind you -- then it is an injustice to him not to be reinstated, regardless of the current media climate surrounding the AJ/Williams case.
And with regard to whether or not he did hit the girl, I've heard that several people witnessed him do so. If so, I wonder if there are extenuating circumstances, like, for example, he hit her because she was physically attacking him?
There's a difference, imo, between outright punching or slapping a girl out of male dominance, and administering a little slap to get her to retract her claws and break off an attack on you. It's hard to take the high ground when you are getting your eyes scratched out.
If several people did witness the former, then, he shouldn't come back regardless of whether or not he's cleared "legally." But if it's a scenario like the latter, there should at least be room for discussion.