Police Authority Outside City
A city’s police authority is extended one mile beyond its boundaries but not beyond the county’s limits and not within one mile of any other city’s boundary "for the suppression of all disorderly acts and practices forbidden by the general laws of the state." T.C.A. § 6-54-301. Mutual aid contracts may be made with another city, with a metropolitan airport authority that provides law enforcement service, with the county, or with organizations of residents and property owners in unincorporated communities providing law enforcement assistance. T.C.A. § 6-54-307.

The Interlocal Cooperation Act allows contracts between cities and counties for police services. T.C.A. §§ 12-9-101, et seq.