You forgot this:
§ 9.33. DEFENSE OF THIRD PERSON. A person is justified in
using force or deadly force against another to protect a third
(1) under the circumstances as the actor reasonably
believes them to be, the actor would be justified under Section 9.31
or 9.32 in using force or deadly force to protect himself against
the unlawful force or unlawful deadly force he reasonably believes
to be threatening the third person he seeks to protect; and
(2) the actor reasonably believes that his
intervention is immediately necessary to protect the third person.
Acts 1973, 63rd Leg., p. 883, ch. 399, § 1, eff. Jan. 1, 1974.
Amended by Acts 1993, 73rd Leg., ch. 900, § 1.01, eff. Sept. 1,
CIVIL PRACTICE AND REMEDIES CODE
CPRC CH. 83. USE OF DEADLY FORCE IN DEFENSE OF PERSON
CPRC § 83.001. CIVIL IMMUNITY. A defendant who uses force or deadly force that is justified under Chapter 9, Penal Code, is immune from civil liability for personal injury or death that results from the defendant's use of force or deadly force, as applicable