The NYPD is spending $390 million on a new radio system that will encrypt officers’ communications — reversing a near-century-old practice of allowing the public and the press to listen to police dispatches.
Archived at https://ghostarchive.org/archive/eqTTk?wr=true
use of different channels (encrypted and not) depending upon the expected contents of the communication would be about as reliable as officer-operated body cams.