Hollywood is smack in the middle of one of the most notorious sheriff's departments in the United States [1][2] with lots of ongoing prosecutions and a history of federal convictions. They know exactly how bad the police are and show a idealized version in media that's very fictional.

If the writers introduced the so-called good guys as the Grim Reapers or Compton Executioners [3], the viewers wouldn't believe it.

[1] https://knock-la.com/tradition-of-violence-lasd-gang-history...

[2] https://en.wikipedia.org/wiki/List_of_LASD_deputy_gangs

[3] https://en.wikipedia.org/wiki/Compton_Executioners

I should have "not nearly as fictional". I know some of it's true, some of it's 'ripped from the headlines', some is rumor, but nothing Hollywood does is ever entirely accurate. Even the documentaries (maybe especially the documentaries)