Trying to imply that Greens on the city council can stop police from murdering their own constituents is also silly. They don't hire the cops, and meaningful reform of PD department's ends up being the voters job since it's usually ballot measures.
Consider that in places like Portland where city government and local people are openly hostile to the cops, the cops are simply quiet quitting. Despite having the budget to hire hundreds of new cops, literally no one applies to work in Portland.
Thus, if your desire is to get cops to stop murdering, you really should vote for the Democrats or greens or whatever. The issue is that the cops just through a massive hissy fit to punish you, the voter, for trying to bring in a safer society.
I was just in South Korea. The cops there are not empowered. Their police stations are usually the most ghetto looking buildings in their community. I could get a cop to look for my lost bags if I needed it, because that's their role in society there. South Korea is one of the safest societies on earth.
Do we have the same structural factors as south Koreans? No, but demilitarized police can still be effective. Luckily hippy blue cities tend to have low violent crime...