I think they should be able to be sued. As I mentioned above, NJ cops can be sued individually for violating one's constitutional rights.
They're going to have to know what the constitutional rights are in order to avoid a lawsuit. Makes for better cops.
I don't think there is much Trump can do about state and local jurisdictions. A bunch of bull.
Not so sure about that, many of the lawsuits, and the crimes, are Federal.