End the drug war entirely. End vice prosecutions. Focus on victimful crimes.
Increase the funds PD's get to the level DA's get. A PD's got a lot more to do than a DA, because the DA has police officers behind it feeding it cases. Funding parity is a Schelling Point.
Stop electing DA's, stop electing judges, stop electing sheriffs; "Tough on crime" is the only campaign strategy these people use, and it's implied to mean "Harsher than was the case last year". That outcome ceases to be remotely just after a few years.
Enfranchise felons with voting rights. The reasoning that they're incapable of voting correctly stems directly from racial persecution.
Cameras everywhere.
Training in conflict de-escalation, like the rest of the world's police forces.
Reduce the prison sentences you give out substantially, and drastically increase spending on the crime-avoidance strategies we pilloried as bleeding-heart liberal ideas. Turns out the most strongly supported finding in criminology is that they work a lot better than increased sentencing.
With the savings from all this prison reduction, build prisons that don't inflict trauma on their prisoners, don't require violence to survive in, and most importantly, don't require joining an organized criminal enterprise, a prison gang, to be comfortable in. Gangs destroy what little benefit you get from imprisoning people.
With what's left over, shift resources away from SWAT & drug enforcement, and towards dramatic increases in the size of the detective force. Higher capture rates beat longer sentences at deterring crime by a very large factor.
Rebuild at least parts of the public mental health system that we shut down completely in the 70's.