Somebody needs to take some more classes in Constitutional law. If what you say is true, the police departments portrayed would be nailed with Section 1983 lawsuits right and left, and the evidence would be indisputable. But that's not what happens, so your premise is obviously flawed.
Somebody needs to get a grip on reality instead of the fantasy that justice or the Constitution matters in our courts. If you think that the police are on one team, you're on the other team, and the court is an impartial referee, then you've been watching too much television. One team has the cops, the prostitutors, the judge, *your lawyer*, and the jailer on it. Hint: you're not on that team and they cheat. Furthermore, I'd like to see a single 1983 case won by anyone who didn't employ an enemy spy (a lawyer) who stood to get a fat kickback. Odds are, there ought to be at least *one* - in the last *30 years*. I won't bother waiting for a win that won't show up. In any event, while the state may fork out some cash from time to time, rarely, if ever, is their power diminished by any precedent set and they only fork out any cash when its politically unavoidable. Even in state court cases where they pay the cases are usually unpublished so the next unfortunate sap has to go through the same song and dance as the first guy and if he hasn't got the same Al Sharpton cheerleading section rooting for him he's SOL. We now resume our regularly scheduled broadcast of "Law and Order" already in progress...