The factory brochures (for civilian models) do not list the police package:
http://www.taurusclub.com/encyclopedia/Articles/92brochure.php

The police/fleet models came with a special owner's manual also:
http://www.taurusclub.com/encyclopedia/Articles/93severeduty.php

This '94 has GL trim on the body-side molding:
http://www.taurusclub.com/encyclopedia/G2/94po-po.jpg

This article says that it is a Taurus L with a special options package:
http://www.taurusclub.com/encyclopedia/Articles/CarCraft-Jul91/1991TaurusLcop.jpg