If the sheriff be a party to or interested in any suit, or for other cause be incapable or unfit to execute his office in any particular case, or if the sheriff shall have outstanding against him a warrant for his arrest, duly executed by any justice court judge, mayor or municipal judge in the county in which he is sheriff, and where there is no vacancy in the office of sheriff, the circuit judge or chancellor of the district in which said county is located, upon being informed of all the conditions and circumstances with reference thereto, may appoint some qualified elector of the county to execute, do and perform the duties of the sheriff.