I can almost guarantee you it's not P25. Hearst is NOT going to pay for a P25 Radio, and my understanding is that P25 is not allowed on 450/455 mhz frequencies. It's Wide or Narrowband voice, and telemetry only.
There was some talk of petitioning the fcc to request digital voice on the 450/455 frequencies on those frequencies, but i believe the discussion was that stations were afraid that if they petitioned the FCC, they'd be forced to narrowband those frequencies.
I had heard this about a year ago, when I was working full time in broadcasting, so things may have changed since then...
My guess is that it's digital telemetry, but I'll take a look.
the preceeding post in no way reflects the views of anyone except myself.