You believed you had every right to protect yourself. You acted on instinct, in fear for your life, and now you’re the one sitting in a police cruiser or staring down an assault charge. Welcome to the cruel paradox of self-defense laws in Texas: doing the right thing the wrong way can very much get you arrested, and even convicted, for a violent crime.
The law doesn’t grade you on your intentions. It grades you on your actions, your words, and every decision you made in those terrifying few seconds. Prosecutors don’t care that you were scared. They care whether your use of force was legally justified, and if you made even one of the mistakes below, they’re going to use it against you.
Mark Thiessen and the Houston assault attorneys at Thiessen Law Firm have defended countless clients who were defending themselves or others and got slapped with assault charges. But a clean conscience doesn’t guarantee a clean record. Knowing where the legal tripwires are before an incident happens could be the difference between walking free and facing serious prison time.
Continue reading about the self-defense mistakes most likely to land you in jail, or contact Thiessen Law Firm today at (713) 864-9000 to protect your life.
Mistake #1: Being the aggressor
This one seems obvious until you’re in the moment, but in the moment, things aren’t so simple. Texas law protects your right to defend yourself, but only if you weren’t the one who started the fight. Under the Texas assault laws, if the evidence suggests you were the initial aggressor (that you threw the first punch, escalated a verbal dispute into a physical one, or provoked the confrontation), your self-defense claim may be dead on arrival.
You don’t have to throw the first punch to be considered the aggressor. If you followed someone to their car after an argument, if you squared up and got in their face, if you made the first threatening move, then a prosecutor can and will argue that you started it, even if your opponent threw the first physical blow.
The law is clear: initial aggressors cannot claim self-defense unless they withdraw from the encounter and clearly communicate that withdrawal before being attacked again. If you can’t demonstrate that withdrawal, you’re going to have a very hard time in front of a jury.
What this looks like in court: Surveillance footage, witness testimony, and your own statements (more on those in a moment) will all be weaponized to establish who started it. One aggressive text message sent before the confrontation can collapse your entire defense.
Mistake #2: Pursuing the fight
The threat has passed (your attacker is running, is on the ground, or has stopped coming at you) but adrenaline says otherwise. You follow. You keep swinging. You don’t stop.
The moment you pursue someone who is retreating, you have crossed a line that the law does not allow you to cross back over. Self-defense only applies to force used to stop an imminent threat. Once that threat is no longer imminent, because they’re fleeing, incapacitated, or no longer fighting you,* continuing to use physical force against them is legally assault. Full stop.
The hardest part of this one is neurological, not legal. Your body is flooded with adrenaline and cortisol. Your threat-response system doesn’t shut off the moment someone turns to run. Controlling that response is not easy, but you’ve got to do it.
*Continue reading: Can you go to jail for fighting?
Mistake #3: Excessive physical force
Texas law requires that the force you use in self-defense be proportionate to the threat you faced. That means you cannot respond to a shove with a firearm, or answer an unarmed attacker with a weapon that causes serious bodily injury, and expect a jury to nod along with your self-defense claim. Disproportionate responses turn self-defenders into defendants faster than almost anything else.
This is especially important for gun owners who carry every day. Producing or discharging a firearm in response to a threat that did not rise to the level of deadly force, like an unarmed person who hadn’t yet made a physical move, can result in charges for aggravated assault or worse. The standard isn’t whether you were scared. It’s whether a reasonable person in your position would have perceived an imminent threat of death or serious bodily harm.
Here’s a quick reference for threat levels and proportionate force:
| Threat level | Proportionate force |
| Verbal threats | No physical force justified |
| Unwanted physical contact/shoving | Reasonable non-deadly force |
| Physical assault causing bodily injury | Physical force, potentially including weapons |
| Imminent threat of death or serious harm | Deadly force may be justified |
Jumping down a row in that chart can make self-defense cases fall apart. Assault with a deadly weapon lawyers have seen this scenario play out countless times: a client responds to a real threat but overcalibrates, and now they’re the one facing felony charges.
Mistake #4: Tampering with the scene
The fight is over and you’re a little shaken up. You look around and you notice things that scare you: a weapon on the ground, a broken object, evidence that might look bad for you. Your instinct is to clean it up, move it, make it look better. Don’t.
Touching, moving, or altering anything at the scene of a self-defense incident, even with the best intentions, can result in evidence tampering charges that are completely separate from whatever happened during the fight itself. If your attacker dropped a weapon, leave it exactly where it fell. If there’s a broken object, leave it. If there’s blood, you already know the answer — leave it.
The same goes for firearms. When law enforcement arrives at a shooting scene, they have no idea who the “good guy” is. Holding a weapon when they arrive creates a serious risk of escalation and can complicate your legal position immediately. Put the weapon down in a safe place before police arrive and tell them where it is when they ask.
Beyond physical evidence, tampering includes anything that tells a different story than what actually happened. Coaching witnesses, deleting text messages, or moving your vehicle all fall into this category. Prosecutors are skilled at identifying when a scene has been altered, and they will use it to argue consciousness of guilt.
Mistake #5: Warning shots from gun owners
There’s a deeply ingrained cultural belief, probably because we watch too many movies, that firing a warning shot is the responsible, de-escalating thing to do. In reality, it is often the opposite.
Warning shots create multiple serious problems at once:
- First, a fired bullet has to land somewhere, and if it injures or kills an innocent bystander, you are now facing reckless manslaughter charges.
- Second, and perhaps more damaging to your self-defense claim: prosecutors will argue that if you had time to fire a warning shot, the threat was not truly imminent enough to justify deadly force. The logic cuts against you. If it was a genuine life-or-death situation, why didn’t you shoot at the threat? If it wasn’t life-or-death, why did you discharge a deadly weapon at all?
This is an area where gun owners frequently get into serious trouble. Texas may be a state that takes self-defense seriously, but that doesn’t mean every use of a firearm is automatically justified. Warning shots land people in front of juries far more often than you’d expect.
Mistake #6: Letting the adrenaline talk to a police officer
You survived the encounter. Law enforcement arrives. You’re relieved, flooded with emotion, and you start talking. And talking. And talking. Every extra word out of your mouth after a self-defense incident is another potential piece of evidence that can and will be used against you in court.
This is arguably the single most common and most damaging mistake people make after a legitimate self-defense incident. In the immediate aftermath of a violent confrontation, your brain is not functioning normally. Adrenaline impairs memory, distorts timelines, and causes people to fill in gaps with assumptions. Statements made in that state will not match your account once you’ve calmed down — and prosecutors will use those inconsistencies to destroy your credibility.
You are never legally required to answer substantive questions from law enforcement without an attorney present. You can and should identify yourself. You can and should tell them you were attacked and that you need medical attention if applicable. Beyond that, the smartest words you can say are: “I want to speak with my attorney before answering any questions.”
How to avoid common self-defense mistakes
Knowing the mistakes is half the battle. The other half is knowing what to do instead. Here’s a breakdown of some things you can do to protect your legal position after a legitimate self-defense incident.
| Know the local statutes before you need them |
| If you’re a gun owner, ask yourself: is Texas a stand your ground state? Yes, Texas has a robust Stand Your Ground law, and you should know how it applies to your specific situation, your property, and the nature of the threat you faced. Texas law distinguishes between defense of person, defense of property, and defense of a third party, and the standards are different in each scenario. Read the statutes. Talk to an attorney before you need one. Surprise is the enemy in self-defense law. |
| Articulate the threat |
| If you are questioned by police, everything you say should be focused on the objective facts that justified your fear. The legal standard is immediate fear of death or great bodily harm, so your language should keep to that standard. “He reached for a knife” is useful. “I didn’t like his look” is not. “He had already hit me twice and was raising his arm again” is useful. “Things just escalated” is not. Stick to objective, observable facts. Avoid speculation, emotion-heavy language, and any statement that sounds like you were the one driving the confrontation. |
| Be the first to call 911 |
| Call 911 yourself, immediately, from the scene. The person who makes the first call is often documented as the victim in the initial report, and that matters enormously as a case develops. Keep it simple: your location, that you were attacked, and that you need help. Don’t editorialize. Don’t explain the whole incident. Just get law enforcement rolling to your location. |
| Keep it brief with police |
| As noted above, give law enforcement the bare minimum required by law. Identify yourself. Tell them you were attacked. Tell them you want to cooperate fully but that you’d like to speak with your attorney first. Then stay quiet. This is not obstruction. This is your constitutional right, and using it is the smart move every single time. Responding officers are not there to help you build your self-defense case. They are there to assess what happened and document it. Everything you say will be in that report, and that report will be in front of a jury if this goes to trial. |
| Proportionality is key |
| Before, during, and after any confrontation, the guiding principle is proportionality. Ask yourself: would a reasonable person in my exact situation have believed this level of force was necessary to prevent death or serious bodily harm? If the answer is genuinely yes, you are likely on solid legal ground. If you’re not sure, that uncertainty is exactly why you need an experienced Houston assault attorney in your corner before you say another word to anyone. |
Self-defense FAQ
What is defined as self-defense?
In Texas, self-defense is the legal justification for using force against another person when you reasonably believe that force is immediately necessary to protect yourself against the other person’s use of unlawful force. The key elements are reasonableness, immediacy, and proportionality.
What can I legally use for self-defense in Texas?
Self-defense laws in Texas allow the use of force, including deadly force under specific circumstances, as well as legal self-defense tools like firearms (with proper licensing for concealed carry), pepper spray, and knives within legal limits. Self-defense weapons must be used proportionately to the threat. What’s legal to carry and what’s legal to use in a given situation are two different questions.
Does training in combat sports or martial arts affect my self-defense case?
It can. A trained fighter using physical force (especially skilled in a martial art or combat sport) may be held to a higher standard of proportionality by a jury. If you are a trained practitioner of martial arts or combat sports, your level of skill may be considered when evaluating whether your use of force was reasonable.
Charged after a self-defense incident? Thiessen Law Firm is waiting.
Legitimate self-defense cases can go wrong fast when self-defense mistakes are made during or in the aftermath. If you or a loved one has been charged with assault, aggravated assault, or any violent offense after defending yourself or someone else, you need an attorney who knows how to dismantle the state’s case and present your defense aggressively at trial.
Mark Thiessen is a quadruple board-certified ACS-CHAL Lawyer-Scientist who has secured 140+ Not Guilty verdicts and 1000s of dismissals for Texans in dire straits. He built Thiessen Law Firm’s reputation on taking difficult cases and turning them into trial wins, fighting for the people, not the system.
If you or a loved one are facing assault charges in Texas, call Thiessen Law Firm today at (713) 864-9000 or contact us online for a free consultation.
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