The Green Valley Sheriffs Auxiliary Volunteers has grown from a band of CB radio enthusiasts who helped the Sheriff with search operations and home visits into a highly trained group of volunteers who assist the Pima County Sheriffs Department in a wide range of services throughout Green Valley.

In 1978, the Pima County Sheriffs Department introduced the Citizen Bear to Green Valley. The Citizen Bear has comprised of Green Valley volunteers used Citizen Band radios for communication. At this time, the role of the Citizen Bear was limited to assisting in search and rescue operations and home visits. The Pima County Sheriffs Department was a national leader in using citizen volunteers.