As stated above it could be an APX mobile or it could also be an XTL5000. Since Regina use phase 1, it could honestly be either.
I have seen this a few times where a department will go encrypted but a news crew will request a radio to be able to listen to traffic in order to be able to get to a scene early. Just like a normal subscriber, if the radio happens to walk off, it will get killed to prevent tampering to the system. It's possible that the radio was programmed not to transmit or they just didn't include a mic so no one accidentally (or intentionally) transmits.
MTS2000des explained it well, I'm just adding a few things