Did you or anyone else catch the P25 encryption on M6 last night at 22:30? It came up with a A4E NAC. I did a double take. I thought it was Marcus Hook until I looked over and saw that it was M6. I've never heard that before.
Sorry, I missed that one. Of course it is "always possible" that UD could incorporate encryption at any time.
Typically, I hear the sgt or lt (41 ,42 06, 07) with the P25 clear, NAC 293. Perhaps this was an UC op?