They are dispatched by El Paso County Sheriff's Office on their talkgroups which can only be found on the Zone/RFSS 4 sites on State of Colorado DTRS. They mainly use TG 4710 (EPSO Channel 1) and are the 5M (5 Mary) units on the air, sometimes shorten to M (Mary) units.
I use to work for them in that area. Retired now. They are in fact dispatched by the EL Paso County Sheriff Office North channel. Their call signs used to be, 5 Mary, for Monument, 5 Paul for Palmer Lake, 5 Charlie...For Calhan PD, etc...Best wishes.