Prosecutors and mayors wouldn't be so tight with cops if not for 1) the role of police unions and 2) optimizing for conviction rates.
Change the incentives, change the outcomes.
SOURCE:
- https://www.newyorker.com/magazine/2020/08/03/how-police-uni...
- https://www.vox.com/policy-and-politics/21290981/police-unio...
- https://www.rollingstone.com/politics/politics-features/poli...
- https://thelensnola.org/2019/04/11/misconduct-by-prosecutors...