We had a county cop that was doing 100+ in a 50 and crashed into a car full of people, killing one IIRC, and putting another in a nursing home for life. He made various false statements about the incident immediately after the incident about why he was doing 100+ MPH without his lights or siren on. Not that it would have mattered much. Even doing the speed limit where he was you don't get a whole lot of time to stop when someone pulls out to make a LH turn onto the road. And the people making the LH turn can't see from there far enough to not pull out in front of someone going 100+ mph.
He was charged but like most of these cases, the system protects its own. The state's attorney claimed they could not prosecute him because they would be representing the county in the civil case (not an unreasonable thing IMO) so the state attorney general did the prosecution. I am guessing they did not send their best and brightest.
After the debacle in court, he got his job back, with back pay too. The county did the right thing by the people who were injured, probably because the negligence was so clear. The amount they settled for exceeded their insurance coverage for a single incident and I suspect it will have to be payed out of the tort fund tax.