https://www.techdirt.com/articles/20190316/15241641806/second-california-appeals-court-refuses-to-review-police-unions-challenge-state-public-records-law.shtml

California law enforcement's losing streak continues. Since the new state law went into effect at the beginning of the year, California police unions have been battling the new transparency, claiming the public records law does not apply to historical records of police misconduct or use of force.

So far, the unions are finding no one who agrees with them. The law's author says the law is retroactive. So have a couple of state courts. The only person siding with unions on the retroactivity issue is the state's top cop, Attorney General Xavier Becerra.