I've brought up a couple things I think, don't know if I got your feedback on them at all...
step 1 dissolve police unions for national security if nothing else, just shove that down their throats like Reagan's ATC if you have to.
https://www.wfla.com/news/florida/florida-officer-fired-6-times-ordered-rehired-again/
step 2 all personnel files disciplinary records need to be public. The murderer from May 25 had a body count and 12 complaints of excessive force/brutality, all of which were closed with no punishment. Clearly the oversight is nonexistent. Create a brand new division of FBI or DHS or whatever agency is appropriate that is dedicated exclusively to hunting down bad cops. Internal Affairs for the entire nation. This is pretty involved cause it's gonna require some degree of federalization of our police system, local, county, state, all need to be on the same page here.
step 3 criminal prosecution must be decoupled from the police. I don't know how exactly that would happen but its necessity is obvious.
step 4 disarm the police, give them their guns back when they go through additional training/retraining similar to what the rest of the world has. SWAT can keep theirs. New police officers don't get a gun, period, for 1 year probationary period. Once you have a gun you are subject to EXACTLY THE SAME STANDARDS (with certain appropriate exceptions like open carry, maybe) as any private, non-LEO CCW licensee. No more fudging cowboys.
step 5 Re-establish the COMMUNITY in community policing. Cops must patrol the areas where they, themselves, live. No more us vs them bull. No arrest quotas, ever.
any additions? I'm sure I've left something out that's kind of important. Like step 6, mandatory body cameras for everyone all the time. Arrests made without body cam or dashcam footage can be straight-up dismissed in court without sufficient other evidence.