My thought is, let the justice system do what it's supposed to do. It appears there was a video which was reviewed by the cops, they seemed convinced that the cop acted aggressively, took prompt action to arrest the cop, and will probably investigate and turn over their results to the DA with the expectation that charges will be filed.
Nobody I know of suggests or insists that there aren't overly aggressive cops on the beat. The problem I have with the Owies and the liberals and the race-baiters is that they insist that every cop walking a beat is just looking for a fight and a black man to shoot. The cops that are bad eggs are few and far between.