What Is Intoxication Assault in Texas? Charges, Penalties & Defense
Intoxication assault is a charge that arises when someone is injured in an accident involving an intoxicated driver — but it is not simply a DWI with an injury. It is a separate felony offense with its own statutory elements, its own penalty range, and its own set of consequences that are distinct from and significantly more serious than a standard DWI charge. Understanding exactly what intoxication assault is, how it differs from DWI, what the state must prove to obtain a conviction, and how these cases are defended in Bexar County gives anyone facing this charge — or anyone who has been in an accident involving an intoxicated driver — the information they need to understand what is at stake.
How Texas Law Defines Intoxication Assault
Texas Penal Code Section 49.07 defines intoxication assault as an offense committed when a person, by reason of intoxication, causes serious bodily injury to another person while operating a motor vehicle in a public place, operating an aircraft, operating a watercraft, or operating or assembling an amusement ride. The most common scenario is an intoxicated driver who causes a collision that seriously injures another person — a passenger, another driver, a cyclist, or a pedestrian.
The critical phrase in the statute is “by reason of intoxication” — the intoxication must be the cause of the accident, not merely a circumstance present when the accident occurred. This causation element is one of the most significant and most contested issues in intoxication assault cases. A driver who was intoxicated but whose intoxication was not the reason the accident occurred — where the accident was caused by road conditions, mechanical failure, or the other driver’s conduct — may have a viable defense to the causation element even if their intoxication is proven.
The Serious Bodily Injury Element
Intoxication assault requires that the victim suffered serious bodily injury — not merely bodily injury. Texas Penal Code Section 1.07(a)(46) defines serious bodily injury as bodily injury that creates a substantial risk of death or that causes death, permanent disfigurement, or protracted loss or impairment of the function of any bodily member or organ.
This is a specific legal threshold that is not met by every injury a person sustains in an accident involving an intoxicated driver. A broken arm that heals completely may or may not qualify as serious bodily injury depending on the severity of the fracture, the treatment required, and whether any lasting impairment resulted. A traumatic brain injury, a spinal cord injury, the loss of a limb, or any injury that creates a substantial risk of death clearly qualifies. Whether a specific injury meets the statutory definition is frequently a contested factual and medical question that requires expert testimony at trial.
The state must prove serious bodily injury beyond a reasonable doubt — and the specific nature and extent of the injury is something the defense can challenge through cross-examination of the treating physicians and through independent medical expert testimony. In cases where the injury is near the threshold of the serious bodily injury definition, that challenge can be the difference between a felony conviction and a reduction to a misdemeanor DWI charge.
The Penalties for Intoxication Assault in Texas
Intoxication assault under Texas Penal Code Section 49.07 is a third-degree felony, carrying a sentence of two to ten years in the Texas Department of Criminal Justice and a fine of up to $10,000. The offense is elevated to a second-degree felony — carrying two to twenty years in TDCJ — when the victim is a peace officer, a firefighter, or an emergency medical services personnel who was performing their official duties at the time of the offense.
In addition to the prison sentence and fine, an intoxication assault conviction results in the same driver’s license suspension consequences as other DWI-level offenses and mandatory compliance with ignition interlock requirements. Because intoxication assault involves an injury to another person, civil liability — a separate lawsuit by the injured party — runs parallel to the criminal case and can produce a judgment for medical expenses, lost income, pain and suffering, and in cases involving egregious conduct, exemplary damages.
A conviction for intoxication assault carries a deadly weapon finding in most cases — because a motor vehicle used in a manner capable of causing death or serious bodily injury qualifies as a deadly weapon under Texas Penal Code Section 1.07(a)(17). A deadly weapon finding significantly affects parole eligibility — under Texas Government Code Section 508.145, a person convicted of a felony with an affirmative deadly weapon finding must serve one-half of their sentence before becoming eligible for parole, compared to one-quarter for most felonies without the finding.
How Intoxication Assault Differs From DWI and Intoxication Manslaughter
The three intoxication offenses in Texas Penal Code Chapter 49 form a sequence based on the severity of harm caused. DWI under Section 49.04 requires only that the person operated a motor vehicle while intoxicated — no injury or death is necessary for the charge. Intoxication assault under Section 49.07 requires that the intoxicated operation caused serious bodily injury to another person. Intoxication manslaughter under Section 49.08 requires that the intoxicated operation caused the death of another person — and is a second-degree felony carrying two to twenty years.
The same accident can give rise to multiple charges at different levels. An intoxicated driver who injures one person seriously and kills another in the same collision can be charged with both intoxication assault for the survivor’s injuries and intoxication manslaughter for the death — with the sentences potentially running consecutively rather than concurrently.
The Statute of Limitations for Intoxication Assault
The statute of limitations for intoxication assault in Texas — the period within which the state must file charges — is three years for the third-degree felony version and five years for the second-degree felony version involving a peace officer, firefighter, or EMS personnel. Cases involving serious injuries from DWI accidents are sometimes not filed immediately — particularly when the extent of the victim’s injuries takes time to fully develop and document — and a defendant who believes their case was closed because no charges were filed immediately may be surprised to receive an indictment months or years after the accident.
How Intoxication Assault Cases Are Defended in Bexar County
The defense of an intoxication assault charge in Bexar County follows a specific analytical framework that begins with the same questions as any DWI case and then adds the additional dimensions of causation and injury severity.
- The legality of the traffic stop and arrest. If the initial stop or arrest was not legally supported, a motion to suppress can eliminate the evidence of intoxication from the case. Without proof of intoxication, the state cannot establish the first element of the offense.
- The proof of intoxication itself. Breath and blood test results, field sobriety test performance, and the officer’s observations are all subject to the same challenges available in any DWI case — calibration records, chain of custody, NHTSA protocol compliance, and the Fourth Amendment legality of any blood draw. In accident cases, blood is often drawn at the hospital as part of medical treatment rather than by law enforcement — and the admissibility of that hospital blood draw for criminal prosecution purposes involves specific legal analysis about whether law enforcement participation in the draw triggers constitutional protections.
- The causation element. This is the distinctive element in intoxication assault that does not exist in a standard DWI charge. The state must prove that the intoxication was the reason the accident occurred — not merely that the defendant was intoxicated when the accident occurred. Accident reconstruction experts, road condition evidence, mechanical inspection records, and the other driver’s conduct are all relevant to the causation analysis. A defendant who was intoxicated but whose intoxication was not the proximate cause of the collision — because the other driver ran a red light, because a tire blew out, because road conditions caused the accident — has a causation defense that is specific to the intoxication assault charge and is not available in a standard DWI case.
- The serious bodily injury element. Medical expert testimony about whether the victim’s specific injuries meet the statutory definition of serious bodily injury is a contested issue in many intoxication assault cases. Defense counsel retains independent medical experts to evaluate the victim’s injuries, the treatment records, and the long-term prognosis, and to provide testimony about whether the injuries qualify under the statutory threshold. A successful challenge to the serious bodily injury element can reduce the charge from a third-degree felony to a Class A misdemeanor DWI with injury.
- Civil liability and coordination with the criminal defense. The civil lawsuit filed by the injured victim — which is a separate proceeding from the criminal case — creates coordination challenges that require careful management. Statements made in the civil case can be used in the criminal case and vice versa. The Fifth Amendment right against self-incrimination applies in the civil case as well. Defense counsel in the criminal case and civil defense counsel must coordinate their strategies to avoid inadvertently creating damaging evidence in one proceeding that is then used in the other.
If you or someone you know has been charged with intoxication assault in San Antonio or Bexar County, call Barton & Associates at 210-500-0000 immediately. These cases move quickly from accident to arrest to indictment, and early attorney involvement gives the defense the best opportunity to investigate the facts before evidence disappears. Consultations are free, confidential, and available 24 hours a day.
