You see a friend, a family member, or a stranger being attacked and you step in. Texas law protects you when you do — but only within limits. Texas Penal Code § 9.33, "Defense of Third Person," is the statute that decides whether your intervention was justified or whether you are the one charged with assault.
What the statute says
Under § 9.33, a person is justified in using force or deadly force against another to protect a third person if, under the circumstances as the actor reasonably believes them to be, the actor would be justified under § 9.31 (self-defense) or § 9.32 (deadly force in defense of person) in using that force to protect themselves against the unlawful force they reasonably believe is threatening the third person — and the actor reasonably believes intervention is immediately necessary to protect the third person.
The two-part test
That language creates two questions a jury has to answer:
- Would the person you protected have been justified in using that force to defend themselves? You essentially stand in their shoes. If they were the aggressor, or if the force they faced was lawful (for example, a police officer making an arrest), your defense generally fails.
- Did you reasonably believe your intervention was immediately necessary? Waiting until after the danger has passed, or using far more force than the situation called for, undercuts the justification.
"Reasonable belief" is judged from your perspective
The most important words in § 9.33 are "as the actor reasonably believes them to be." You are judged on what you reasonably believed at the moment — not on what turned out to be true. If you honestly and reasonably believed someone was about to be seriously hurt, you can be justified even if it later turns out the situation was less dangerous than it looked. That is why the details you observed — what you saw, heard, and knew about the people involved — become the heart of the defense.
Why this matters in a Harris County case
Prosecutors often charge everyone involved in a fight and sort it out later. As former prosecutors, Brian Foley and Luis Baez know how the State evaluates these cases and how to present a justification defense that gets charges dismissed before trial or wins an acquittal in front of a jury. Once justification is raised by the evidence, the State must disprove it beyond a reasonable doubt.
If you were arrested after stepping in to protect someone, do not give a statement without a lawyer. Call or text (713) 703-1718 for a free consultation, or read more about defense of a third party and the Texas Penal Code.