It could be some sort of a task force or tactical operations group...
In Utah County 11J and 12J are not used according to the State Callsign Guide. However 11J is being used by Utah County Major Crimes whenever they are on any of the local dispatch channels usually requesting uniformed back up from that agency.
Just a thought.....
RS PRO-96, RS PRO-95 (2), RS PRO-94, RS PRO-93, RS PRO-2096, RS PRO-2067 (3), Uniden BC 60-XLT (3), Uniden BCT 7.