I will just note that three years after brutally beating a man to death, the Louisiana state troopers have had zero charges filed against them for the cold blooded torture and murder captured on camera. While the systemic cover-up of the assault did force one higher level resignation. And in the second similar case where the victim wasn't quite killed, the cops are finally being charged with... a misdemeanor. At least they were finally fired/resigned.
Bottom line from the justice department, torture and murder is perfectly legal if you're a cop and the victim is a poor minority, even when the incident is caught on video. If you do so repeatedly on camera, and brag about it afterwords, at worst you might (eventually, after a decade) lose your job. These thugs got away with it repeatedly, for at least a decade, with support and coverup from their bosses.
In the Greene case, the only people directly losing jobs for the actual murder were "former Louisiana State Police Trooper Carl Cavalier, who was fired after speaking out about Greene’s death, and Albert Paxton, the now-retired detective who has said supervisors pressured him not to bring state charges in the case."