All witnesses entitled to compensation under §§ 40-25-106 and 40-25-129 appearing for the state under subpoena, either before a magistrate or the grand jury, or on an indictment found, are to have the same compensation for their attendance as in civil cases, unless otherwise provided.
Fees for state witnesses
Tenn. Code Ann. § 40-17-112, under General Provisions.
Tenn. Code Ann. § 40-17-112