Serial number range puts it appox. '93-'94 or so. As far as a law enforcement piece, unless it's marked, you can send for a letter and find out who it was shipped to. Other than that, who knows. I suspect it wasn't as by the time it was made most agencies were done issuing revolvers. But, you never know. I have 2 15's that were used in law enforcement. One is stamped Spokane Police and I bought it in '89 when they transferred to autos. The other gun is not marked in any way, but I personally know 2 law enforcement officers that used this particular firearm. One of them was my father.
Edit: Too slow! As usual someone named Murphy kicked my butt!