There's lots of precedent of officers being charged and arrested. Not often enough, and they are especially acquitted too often, but the public perception that they aren't charged is a function of media narrative, not fact.
>>throwa+(OP)
The cop in question had 18 prior complaints against him.
I don't know about you, but if I had 18 complaints against me at work, I would probably have got in trouble by now, and I'm not talking about two "letters of reprimand".