14-021, -022, and -024 fall in the DSP's Special Events talkgroups range (which runs from 14-021 thru -027). Any particulars that could narrow it down a bit? Are you thinking it might be a simulcast of someone elses traffic?
I just came back from the w2lie.net forums and it's been reported over there that...
14-021 is now Kings Park Police,
14-022 is now Lake Success Police, and
14-024 is now Port Washington Police
The timing of this move was around the rebanding of the Nassau County 800 MHz EDACS. Based on the transitory history of the Metro21 talkgroups involved, I'm wonding if this is a permanent change for the agencies involved or not.
14-023 is Sands Point PD. I reported this in the forum sometime ago, but I was on vacation until recently. Apparently this maybe a permanent change as I heard units reporting dead spots etc. to their HQ and then being recorded in a log apparently to let the radio techs know.