In the event that the office of sheriff becomes vacant due to death, resignation, incapacity, or other causes, the duties of the office shall be temporarily discharged by the chief deputy, or administrative assistant or other highest ranking member of the sheriff's office, until the sheriff is able to reassume the office or until the county legislative body appoints a successor as provided for in § 5-1-104(b).
T.C.A. § 8-8-107