TexasCHLforum.com

Call the DPS and get it documented.

Here's about as close as the LTC-16 gets to the topic. And I could have sworn there was something about a person being able to request the revocation (or suggest) of a license. I can't find it so maybe I'm making it up.

GC §411.188. HANDGUN PROFICIENCY REQUIREMENT.
(k) A qualified handgun instructor may submit to the department a written recommendation for disapproval of the application for a license or modification of a license, accompanied by an affidavit stating personal knowledge or naming persons with personal knowledge of facts that lead the instructor to believe that an applicant does not possess the required handgun proficiency. The department may use a written recommendation submitted under this subsection as the basis for denial of a license only if the department determines that the recommendation is made in good faith and is supported by a preponderance of the evidence. The department shall make a determination under this subsection not later than the 45th day after the date the department receives the written recommendation. The 60-day period in which the department must take action under Section 411.177(b) is extended one day for each day a determination is pending under this subsection.

HSC §12.092. MEDICAL ADVISORY BOARD; BOARD MEMBERS
(b) The medical advisory board shall assist the Department of Public Safety of the State of Texas in determining whether:
(1) an applicant for a driver’s license or a license holder is capable of safely operating a motor vehicle; or
(2) an applicant for or holder of a license to carry a handgun under the authority of Subchapter H, Chapter 411, Government Code, or an applicant for or holder of a commission as a security officer under Chapter 1702, Occupations Code, is capable of exercising sound judgment with respect to the proper use and storage of a handgun.

HSC §12.095. BOARD PANELS; POWERS AND DUTIES
(e) The panel may require the applicant or license holder to undergo a medical or other examination at the applicant’s or holder’s expense. A person who conducts an examination under this subsection may be compelled to testify before the panel and in any subsequent proceedings under Subchapter H, Chapter 411, Government Code, or Subchapter N, Chapter 521, Transportation Code, as applicable, concerning the person’s observations and findings.