It is not unheard of, if PCSO is involved in a search, to bring in outside help depending on the terrain.
There is a group here (Arizona Rangers I believe) that quite often helps in local searches, most of these volunteers bring their own trucks, horses and trailers to the search site. They work closely with law enforcement as it just isn't feasible for TPD and PCSO to have a full time mounted search units, and because some of the outlying areas of town are still untouched desert, horseback is still the quickest and most unobtrusive way to search most of these areas.
This is personal knowledge, other than the exact name I'm afraid.
There is a group here (Arizona Rangers I believe) that quite often helps in local searches, most of these volunteers bring their own trucks, horses and trailers to the search site. They work closely with law enforcement as it just isn't feasible for TPD and PCSO to have a full time mounted search units, and because some of the outlying areas of town are still untouched desert, horseback is still the quickest and most unobtrusive way to search most of these areas.
This is personal knowledge, other than the exact name I'm afraid.