Texas Statutes
Article 24.29. Uniform Act to Secure Rendition of Prisoners in Criminal Proceedings
Section 7. Prisoner From Another State Summoned to Testify in This State

Sec. 7. PRISONER FROM ANOTHER STATE SUMMONED TO TESTIFY IN THIS STATE. (a) If a person confined in a penal institution in any other state may be a material witness in a criminal action pending in a court of record or in a grand jury investigation in this state, a judge of the court may certify that:
(1) there is a criminal proceeding or investigation by a grand jury or a criminal action pending in the court;
(2) a person who is confined in a penal institution in the other state may be a material witness in the proceeding, investigation, or action; and
(3) his presence will be required during a specified time.
(b) The judge of the court in this state shall:
(1) present the certificate to a judge of a court of record in the other state having jurisdiction over the prisoner confined; and
(2) give notice that the prisoner's presence will be required to the attorney general of the state in which the prisoner is confined.