As far as I'm aware this never happens, or at least I've never heard of it. But then, IANAL.

Not that I disbelieve you, but I'm curious. Can you cite some real-life cases where officers that poked their noses where they ought not have later been prosecuted and actually been punished? My guess is that they'll be protected by qualified immunity. (but then, that immunity probably isn't available in the case at hand)

Anecdote: I have a friend who was handing out pamphlets in front of the post office on Tax Day. He was arrested and later sued for 1st Amendment violations. He won his case against the town, but the prosecution against the officers failed because they thought they were doing the right thing (with no acknowledgment of the fact that their job makes it critical for them to have this knowledge).