Lucky this policeman was wearing a bodycam or the #metoo movement would have had him hanging from a tree, or if he was lucky just fired from his job without a pension and reputation in tatters.
They'd do that anyway if they could and they will if they get enough power. Like all extremist bigots, they don't give a damn about the truth as long as they can harm their chosen target biological group and in any case they've probably convinced themselves that their target biological group is always guilty regardless of evidence. They're far more dangerous than most such bigots because they have far more political power and political skill, so they can do far more harm to the ideas of presumption of innocence, a fair trial and all the rest of justice. They are making progress on that front - they have already succeeded in having presumption of guilt for their target biological group widely seen as being a good thing and they can and do demand that presumption of guilt publically without the villification that should result when extremist bigots demand that a biological group be presumed guilty. They're making some headway towards having that presumption of guilt made official policy de jure and they're making more headway towards having it made policy de facto by the success they're having in swaying people to their ideology of irrational prejudice. Since people form juries, conditioning enough people to presume that the "wrong" biological group is guilty will bias trials.
Notice that even the apology from the law firm which greatly worsened the harm done by the presumption of guilt solely on the grounds of biological grouping explicitly
praised that presumption of guilt. The only thing these bigots consider wrong about false accusations is any attention being paid to them because that might, just might, slow down the ever-increasing presumption of guilt a little bit. The law firm had to make some statement as a PR exercise, of course, but it won't change the way they work. Other such bigots won't even bother with that - they see nothing wrong in presuming that their target biological group is guilty and it's socially and legally acceptable for them to publically and vociferously say so, so why would they apologise for doing so?
If this keeps up then before too long bodycams will become the hottest new fashion item for men, the ultimate police state accessory.
They would be stigmatised and then banned for that purpose. Proof of innocence is something these bigots particularly hate because it might, just might, slow down the ever-increasing presumption of guilt that they love so much. Many of them are fantasising about it reaching the extent necessary for them to get away with the lynchings that they so passionately want to take part in, so they won't want anything to delay the progress to that point.