Tex. Health & Safety Code § 161.041

A physician who attends or treats, or who is requested to attend or treat, a bullet or gunshot wound, or the administrator, superintendent, or other person in charge of a hospital, sanitorium, or other institution in which a bullet or gunshot wound is attended or treated or in which the attention or treatment is requested, shall report the case at once to the law enforcement authority of the municipality or county in which the physician practices or in which the institution is located.