Okla. Stat. tit. 57, § 214

The Director of Corrections and responsible officials at a state institution shall be considered individually and collectively to enjoy the sovereign immunity of the state, as provided in The Governmental Tort Claims Act, for civil suits which might arise from their administration of Sections 211 through 214 of this title when acting in their regular course of duty, and in good faith under the provisions of Sections 211 through 214 of this title.