I don’t think there is one. Certainly not a fast one. This goes to a basic core problem of group dynamics. This isn’t liberal vs conservative. This is how things work, how people work. Groups of people are more concerned with perpetuation of their organization than the task the organization exists for. Look at Mothers Against Drunk Driving. They started as a group who wanted society and the laws to take drunk driving seriously. Once they won that war though they didn’t want to declare victory and disband. So they’ve morphed into a temperance organization.
Police forces are primarily concerned with themselves. They want keep their funding, and keep their power, and will do anything, including protecting their worst members from detection and prosecution to do that. Plenty of police department heads in this country are elected not appointed. But even then we get no chance to fix it. I remember a bit back the Pima County Sheriff announced he was retiring. In between that announcement and the election PCSD was involved in a no-knock raid that hit the wrong address and resulted in a guy being flat out murdered by the cops. This was an open seat election so we had multiple candidates from both parties running. Not a damn one of them were willing to say anything about it, nobody took a stand against no knock, nobody mentioned crappy training that leads to cops not even knowing the address they’re kicking in. Nothing.
So no. None of your steps will change anything about this. I don’t know how to fix it. I can ameliorate some of the symptoms.
Part 1 - end all laws that make crimes against cops a higher penalty than the same thing against a civilian.
Part 2 - end qualified immunity.
Part 3 - treat ALL officer involved shootings as a crime, I don’t care how clean it looks, take it to trial, put the evidence on the public record for all to see.
Part 4 (really 3.5) - develop a nationally available pool of prosecutors to handle ALL cases where cops are defendants, we know from way too many cases prosecutors softball cases against cops because ones that get a rep for being tough on cops find cops in the witness stand suddenly don’t remember anything and that prosecutor’s career is basically over.
None of these will solve the problem. But some of the aspects of the problem might get improve.
I agree with all except prosecuting all cops as crime. In a self defense situation that is clearly self defense, one expects prosecutors to accept the facts and not persecute the shooter.
But I do admit that an outside group of prosecutors would see that a lot of questionable cases would be tried fairly. I would suspect that they would also dismiss charges against those cops who shot according to the ordinary rules of self defense, which of course includes the defense of others.
And I definitely agree with your opinion on no knock raids. That and swat teams used for everything except failure to feed the parking meter have done much to damage public opinion.