A few random ideas:
* fewer armed police, and being armed requires a higher level of experience/training/psych evaluation
* 100% public access to all police body cam footage.
* require police officers to maintain their own liability insurance, and have rates based on the a number of KPIs related to public safety and ethics
Body cams might be an example of something that is good on paper but actually just distracts people from things that actually address a problem.
Parent comment was dismissing reform as a path forward though.
And, do you have a working example?
Another step would be to recognize that you cannot reform american police departments' roles in non-violent crime cases and offload some or all of those entirely to other agencies that don't carry guns. This doesn't fix everything, but it removes many opportunities for things to go wrong while also enabling armed police to focus on the threats that really need them.