So, today while visiting the flatirons mall I encountered strong evidence of an "unknown" DTR site (i.e. not listed in RR), which seems to provide excellent in-building DTR coverage to DTR radios. As far as I know, broomfield PD officers assigned to the mall only carry a single DTRS radio, and the mall UHF security channel is not patched to DTRS. Any idea what might be going on here??