You're never going to win a suit against policemen not doing their duty.
* https://scholar.google.com/scholar_case?case=910846825412517...
* https://caselaw.findlaw.com/court/us-supreme-court/545/748.h...
* https://scholar.google.com/scholar_case?case=910846825412517...
* https://caselaw.findlaw.com/court/us-supreme-court/545/748.h...
But the more people say "you're never gonna win" -- the less people care, coming to the current situation.