Tex. Code Crim. Proc. art. 11.29
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
The person on whom the writ of habeas corpus is served shall immediately obey the same, and make the return required by law upon the copy of the original writ served on him, and this, whether the writ be directed to him or not.
Tex. Code Crim. Proc. § 11.29