Even if the comms are in the open currently during the setup and testing stages, it doesn't mean they won't enable encryption later on (more than likely they will).
It doesn't sound like testing anymore but I agree they will most probably encrypt SWAT and other sensitive departments. All of this to be determined....
Not sure what you use but my psr-500 does not track this system at all. I submit one will need a phase 2 scanner to hear anything. Unless you are aware of something I'm not? Please share.