If you look at the Montgomery County page and scroll to the bottom you will find two DMR systems listed,
the Hollywood Gaming at Dayton Raceway and P&R Communications.
There may also be other systems and conventional repeaters that haven't been discovered yet.
Click on the FCC License tab, then on Display All Licenses, go through the listings via callsign
and look for emission code 7K60FXE (DMR Voice).