T.C.A. § 41-2-111(c)
Each county is required to have a disciplinary review board composed of six impartial members, one or more of whom may be members of the workhouse staff. The members of the disciplinary review board are appointed by the sheriff or the superintendent of the workhouse, subject to approval by the county legislative body. Members serve for a period of two years, except that appointments made to fill unexpired terms are for the period of such unexpired terms. No less than one and no more than three of the members of the disciplinary review board are required to transact the business authorized by law. Members of the board, while acting in good faith, shall not be subject to civil liability relative to the performance of duties delegated to the board by law.