Also checked the entire state for a license, nothing found. Morton's has three locations listed: Clarksburg and Rockville in Montgomery County, and Laurel, which could be PG, AACo or Howard, lol. There are a lot more commercial radio services in MC.
As far as the ability to monitor, IDK - business class radio doesn't interest me so I've never tried. For scanning radios, you can buy protocol upgrades to monitor DMR-type (NXDN, MotoTBRO) systems, but that's a potentially expensive experiment. Apparently DSD+ Fastlane can monitor at least one of these protocols, but it's outside of my experience so I really can't help.