The challenge is that any sort of policing reform is going to require buy in from the communities they serve. That means whatever proposed solution that are offered need to be accepted. I don't think any sort of reform done by fiat will work.
I’ve said before and really believe it to be true - too many in our culture have a fetish for punishment. Like they would like nothing more than public executions and flogging coming back into vogue. Like they enjoyed Cops to an unhealthy degree
For them bad policing is a feature not a bug
I think it will have to be top down reform
I’m not sure how White Nationalists, et al, get ferreted out of the system