If you are talking channel 14 on their handhelds, 460.575. That frequency is listed as Fire/Administration in P25 mode of Westport, CT, that might be what you were hearing.
New system is moving along. If you listen you will hear them testing alot.
As far as p25 audio on Ch14. It's possible that a radio could have been miss programmed and set to digital. I ran across a few radios doing training and they were TXing in P25. All of our radios decode it so people don't know that it's happening.