Except for plea bargains, where it is often "innocent until bullied into accepting a plea deal as the better option - even when you didn't do it". No need to prove anything there.

I am currently in the court system defending my innocence regarding a recent incident which I can't currently discuss, and the officer who charged me was literally bragging about how most of the charges would get "pled down"; he was openly and deliberately frontloading me with bogus extra charges hoping some would stick if I did a plea deal for the rest. He told me that if I talked back to him, he'd give me an assaulting an officer charge just because he could get away with it. The corruption is baked into the system from top to bottom.