The corruption of LAPD and government failure to rein in the department is well documented. The rampart division was involved in drug dealing, murder for hire, planting drugs on innocent suspects, excessive force without provocation, and numerous other crimes. A a result of the FBI investigation the state had to release hundereds from prison.
I rode through there in the early 1970's and a group of bikers I ran into told me I should carry a small amount of marijuana on me when in LA county, so the police would not plant something worse on me. I laughed at them and thought they were joking, being a newbie to CA.
It was no joke. People that have not lived in CA can never understand that attitude that the police are not the good guys. Yes, CA has rampant crime and the highest prison population in the world but when you live there you learn to fear the police as much as the criminals. If it weren't for badges and uniforms it would be hard to tell the difference.