I believe it's the primary reason for the complete apathy law enforcement shows towards de-escalation and self-restraint in general.
Why bother behaving when the standard for prosecuting you is so high as to be laughable?
So a pretty reasonable question you'd ask in the rest of the world is: Why aren't these cops prosecuted for excessive violence? The use of civil rights lawsuits in the US was a workaround for an already broken legal system that doesn't punish wrong doing by certain people.
- While the (especially Anglo-American) courtroom is adversarial, prosecutors shouldn't be at all compensated (money, promotion, etc.) by who they lock up. Something based on future crime rates would be much better.
- Rather than DA's needing the police, the police should need the DA. Arresting someone that isn't convicted should reflect very poorly on the police.
That side, both groups are badly in need of complete replacement, which makes it hard to talk how they ought to work together when the real "ought" goes so much further
It's not great to rely on intermediate performance, but it is often less worse than the alternative.