Looking at the database both Denton City and Denton County are Analog Motorola-II Smartnet. However both are Trunked radio systems. However, both will at some point go digital, so folks say.
The BC370CRS is an analog Conventional scanner only, it is not capable of tracking a trunked radio system.
You should be considering a BCD396XT, BCD996XT, Home Patrol-1 or BCDx36HP for Digital Trunking or BCT15X or BC346XT for analog trunking or the Whistler WS series when it launches later this spring.