Okla. Stat. tit. 12, § 416

Whenever a witness summoned as mentioned in Section 4 of this act fails to testify, and the facts are reported to either house, the President of the Senate or Speaker of the House, as the case may be, shall certify the fact under the seal of the Senate or House to the Attorney General and district attorney of the county where the witness failed to appear, whose duty it shall be to bring the matter in the proper court by information or indictment for prosecution.