The board shall have the power to administer oaths, take depositions, certify official acts, and issue subpoenas to compel the attendance of witnesses and production of papers necessary as evidence in connection with any hearing, investigation, or proceeding within the purview of this part. The sheriff, or some other person so designated by the sheriff, shall serve all processes of the board, and shall attend and preserve order at all public hearings conducted by the board. If a person refuses to obey a subpoena from the board, the board or its authorized representative, may ask the Circuit Court of Etowah County to order the evidence to be produced. Upon proper showing, the circuit court may order compliance with the subpoena. Failure to comply with such an order may constitute contempt of court. The fees of witnesses for attendance and travel shall be the same as fees for witnesses in the circuit courts of this state, which fees shall be paid from the county treasury.