I do know they issues both Model 14s and 15s at one time. I don't know if they chopped down any 14s, but it would not surprise me one bit. For generations, the Smith and Wesson and Colt revolvers in 38 Special were issued to just about every police department and agency in this country. The Highway Patrol tended to use the 357 Magnum round. With proper ammo the 38 Special is still a very respectable round to "take care of business" with.
Somewhere along the way, the various LEO types thought they were outgunned on the streets by the thugs and started issuing high capacity 9mms and later 40s. The number of shots fired per hit went way up with that change and bystanders were placed in increased danger when the cops started pressing the trigger. There is no going back to the "service revolver", but it was made obsolete by a change in thinking and perception and not by any kind of reality.