MarMatthias
Member
Law Enforcement officers have the right to protect themselves also, they are serving the public and protecting your life and property at their risk of personal life.
Their best protection is not hiding open information behind the guise of security. There have been too many cases where people have come to the aid of an officer because they heard the incident of their scanner.
Also consider the fact that public relations and trust of the police depends on openness and transparency. Encrypting every single police channel does nothing but foster mistrust in the police with question of "what are they hiding?"