TG 1152 historically has been used as the Mobil Watch in SLC. In several of the more "active" neighborhoods in the NW part of the city they had trained civilian observers driving the streets and if they saw anything suspicious or witnessed a crime, their job was to get license numbers and be a good witness. They would also use a city issued radio to get a police presence almost immediately. Now they are using that TG as a "APB" channel which all cars monitor (scan). That might account for the same RID.
I've had my scanners running tonight, but I haven't heard anything "pop." Seems like business as usual for a Friday night. Course I have not been paying real close attention since I have had my nose in a book given to me last Saturday!