here's a few sightings...
1) 1+ year ago; Camp Hill, PA, small & quiet shop, a friend of the shop stops in to say hello and he has a Taurus .38 revo and someone asked him where he worked; some sort of federally contracted security officer in Harrisburg, PA; loaded with sjhp .38 +p
2) 1 + year ago; Camp Hill, PA, local hospital, prison guards escorting prisoner through hospital; S&W K or L frame stainless revolver; guessing loaded w/ .38 +p
3) a few summers ago while visiting parents; greater Wilkes-Barre, PA area, summer 'bazaar' festival at a local Catholic church, several local constables spotted, one with a blued wheelgun in a older style belt drop holster
they may not be 'police' but each functions in a law enforcement capacity in one fashion or another