They can get mad all they like. They can also start counting up the money they will pay out from the lawsuit. Police harassment is BIG bucks and the situation, motive, documentation and witnesses are already in place.
The individual being harrassed in this case has another thing on his side- everyone knows he’s being harrassed, because word of the harrassment itself is already out.
If someone PO’s a cop and then they are harrassed in private, it might remain private.
That we are reading this now, and that any retaliation the cops may take will be public, is acting as a shield to protect this man.