Tennessee Code Title 39. Criminal Offenses § 39-11-621

A private citizen, in making an arrest authorized by law, may use force reasonably necessary to accomplish the arrest of an individual who flees or resists the arrest; provided, that a private citizen cannot use or threaten to use deadly force except to the extent authorized under self-defense or defense of third person statutes, §§ 39-11-611 and 39-11-612.