Tennessee Code Title 8. Public Officers and Employees § 8-8-417

(a) The practice and procedure of the board with respect to any investigation by the board authorized by this part shall be in accordance with the rules and regulations to be established by the board. The rules shall provide for reasonable notice to all persons affected and for the opportunity to be heard, either in person or as represented by counsel, and to introduce testimony in their behalf at a public hearing.

(b) The board, when conducting any investigations or hearings authorized by this part, shall have the power to administer oaths, take depositions, issue subpoenas, and compel the attendance of witnesses and the production of books, accounts, papers, records, documents and testimony. If any person fails to comply with the orders of the board or of a subpoena issued by the board or any of its members, or if a witness refuses to testify on any matter on which the witness may be lawfully interrogated, the judge in any court of record within the county, on application of any member of the board, shall compel obedience by proceedings as for contempt. The sheriff or the sheriff's legal deputy shall serve such subpoenas as issued by the board.