Tenn. Code Ann. § 41-21-406: Inmates as witnesses against each other

The inmates in the penitentiary shall be competent witnesses against each other in all prosecutions under §§ 39-12-101 , 39-13-304 , 39-16-201 , 39-16-402 , 39-16-403 , 39-16-605 - 39-16-607, 39-17-302, 39-17-303, chapter 1, part 1 of this title, parts 1-4 of this chapter and chapter 22, parts 1 and 2 of this title.