Intoxication Assault and Intoxication Manslaughter in Texas

Almost nobody charged with one of these offenses set out to hurt a person. That is the point of the phrase "by accident or mistake" in both statutes. The conduct the law punishes is driving while intoxicated; the injury or the death sets the punishment level. It means the usual instinct, to explain that it was an accident, describes an element of the offense rather than a defense to it. Peter M. Barrett has defended Dallas County cases since 1994, through more than 150 jury trials, and the case review is free and confidential. This guide sets out what each statute requires, what the sentence ranges actually are, and where probation sits.

The two offenses side by side

What "intoxicated" means

§49.01(2) gives two independent routes, and the State needs only one of them:

• Loss of faculties. Not having the normal use of mental or physical faculties by reason of alcohol, a controlled substance, a drug, a dangerous drug, a combination of those, or any other substance introduced into the body.
• Alcohol concentration of 0.08 or more. Measured, under §49.01(1), as grams of alcohol per 210 litres of breath, per 100 millilitres of blood, or per 67 millilitres of urine.

The first route matters more than people expect. It does not depend on a number, which is why a case can proceed on prescription medication, or on a combination of a lawful prescription and one drink, with no unlawful substance anywhere in it. It also means a blood result below 0.08 does not end the case by itself.

Serious bodily injury is a defined term

For intoxication assault, §49.07(b) supplies its own definition. The injury must be one that:

• creates a substantial risk of death; or
• causes serious permanent disfigurement; or
• causes protracted loss or impairment of the function of any bodily member or organ.

A painful injury, an ambulance ride, a night in hospital, even a broken bone that heals, do not automatically satisfy any of the three. This is frequently the live issue in a §49.07 case, and it is a medical question before it is a legal one, which is why the records and the treating opinions matter so much. Where the injury does not meet the definition, the offense is not intoxication assault; the driving conduct remains chargeable as a driving while intoxicated offense.

When the grade goes up

§49.09 carries the enhancements, and they turn on who was hurt.

The duty element is real and it is contested. §49.09(b-1) requires that the officer, judge, firefighter or medic was "in the actual discharge of an official duty" at the time, and §49.09(b-3) defines firefighter and emergency medical services personnel narrowly, including a volunteer unit that drills at least twice a month for at least two hours.

A section that currently reads two ways

This is unusual enough to be worth stating plainly. In 2025 the Legislature passed two separate bills that each amended §49.09(b-2), the first degree enhancement for intoxication manslaughter, and the two were never reconciled. Both versions took effect on 1 September 2025 and both are printed in the statute today:

• The S.B. 745 version makes §49.08 a first degree felony where the person caused the death of a first responder or judge as described in (b-1), or of more than one person during the same criminal transaction.
• The H.B. 2017 version, cited in the bill as Grayson's Law, makes it a first degree felony where the person caused the death of someone described in (b-1), or had a prior intoxication conviction and was in violation of Penal Code Chapter 51 at the time.

H.B. 2017 did more than change the grade. It amended art. 42A.059 so that a defendant charged with or convicted of §49.08 punishable under §49.09(b-2)(2) is not eligible for community supervision at all, deferred or regular. It also added Gov't Code §508.145(e-1), under which someone serving a sentence for that enhancement is not eligible for parole until 10 actual calendar years have been served, with no good conduct credit counted.

Which version controls in a given case is a question of statutory construction that has to be argued, not assumed. Anyone reading a summary of this offense written before September 2025, including many that are still online, is reading the old provision.

Probation: available, and misunderstood in both directions

Two separate rules get confused here, so it is worth separating them.

Deferred adjudication does not exist for these offenses. Art. 42A.102(b)(1)(A) lists §49.07 and §49.08 among the offenses a judge may not place on deferred adjudication. The same provision rules out deferred for driving while intoxicated with a child passenger, boating while intoxicated with a child passenger, and for any driving while intoxicated case where the person held a commercial licence or had an alcohol concentration of 0.15 or more.

Regular community supervision is available. Neither §49.07 nor §49.08 appears on the art. 42A.054(a) list of offenses for which a judge may not order community supervision. That list names murder, capital murder, aggravated kidnapping, aggravated robbery, the child sex offences and others; intoxication manslaughter is not on it, and the word "intoxication" does not appear in the article at all. This surprises people who have been told intoxication manslaughter is non-probatable. As written, it is not.

What does remove the option is art. 42A.054(b): a judge may not order community supervision where it is shown that a deadly weapon was used or exhibited during the felony and the defendant used or exhibited it. A motor vehicle can be found to be a deadly weapon in the way it was driven, so in practice the deadly weapon issue, not the offense label, is what decides whether a judge can probate an intoxication manslaughter case. That finding has a second effect, below.

What probation actually requires

Where community supervision is granted, Chapter 49 cases carry conditions the judge has no discretion to leave out:

• Jail as a condition. Art. 42A.401(a) requires at least 30 days confinement for a §49.07 conviction and at least 120 days for a §49.08 conviction. Under art. 42A.401(b), if probation is later revoked and a sentence of confinement imposed, that time may not be credited toward it.
• Dependence evaluation. Art. 42A.402 requires an evaluation and a prescribed course of rehabilitation, at the defendant's cost based on ability to pay.
• Education programme. Art. 42A.403 requires completion of a regulated driving while intoxicated education programme before the 181st day of supervision, with waiver or extension only on a written motion showing good cause.

Parole, and why the deadly weapon finding matters twice

A prison sentence does not mean serving all of it, and which rule applies depends on the judgment.

• Without a deadly weapon finding, Gov't Code §508.145(f) sets parole eligibility at actual time served plus good conduct time equal to one quarter of the sentence, or 15 years, whichever is less.
• With an affirmative deadly weapon finding, §508.145(d) applies instead: no parole until actual calendar time served, without any good conduct credit, equals one half of the sentence or 30 calendar years, whichever is less, and never less than two calendar years.
• Under the Grayson's Law enhancement, §508.145(e-1) sets a flat 10 actual calendar years.

So the deadly weapon question decides both whether a judge can grant probation and, if prison follows, whether release eligibility arrives at a quarter of the sentence or half of it.

More than one victim

Ordinarily, under §3.03(a), sentences for offenses arising out of the same criminal episode tried together run concurrently. §3.03(b)(1)(A) carves out §49.07 and §49.08 by name: those sentences may run concurrently or consecutively, whether the convictions are under the same section more than once or under both sections. The carve-out expressly covers convictions reached by plea agreement as well.

The practical consequence is large. A collision with two deaths is not capped at 20 years because both offenses are second degree. The sentences can be stacked, so the exposure is the sum. This is one of the main reasons the number of people injured in a single crash changes the shape of a case so much.

These convictions follow you into the next case

Under §49.09(c)(1)(B), an offense under §49.07 or §49.08 counts as a prior "offense relating to the operating of a motor vehicle while intoxicated" where the vehicle was a motor vehicle. Under §49.09(d), a conviction for any of the Chapter 49 offenses on or after 1 September 1994 is a final conviction whether the sentence was imposed or probated. A probated intoxication assault is therefore a full prior for enhancing a later driving while intoxicated charge.

One limit is worth knowing: §49.09(g) allows a conviction to be used for enhancement under §49.09 or under the habitual offender provisions of Chapter 12 Subchapter D, but not under both.

A new felony route that took effect in 2025

Separately from these two offenses, S.B. 826 added §49.04(e) with effect from 1 September 2025: a driving while intoxicated offense committed while operating in a school crossing zone during the reduced speed limit period is now a state jail felony, 180 days to 2 years, with no injury to anyone required. It sits alongside the existing routes, a third conviction and driving while intoxicated with a child passenger among them. Our guide to when a Texas driving while intoxicated charge becomes a felony covers how these interact.

Where these cases are actually fought

Because intent is not an element, the contest sits elsewhere:

• Causation. The statute requires the injury or death to occur by reason of the intoxication, not merely in the course of a crash involving an intoxicated driver. Where another driver ran the light, where a mechanical failure intervened, or where the collision would have happened to a sober driver in the same position, causation is contested on the reconstruction evidence rather than on the blood result.
• The blood draw. Mandatory draws in injury and death cases are governed by statute and by Fourth Amendment warrant law, and the chain from draw to analysis to report is where suppression issues arise. Our note on refusing a breath test deals with the consent framework.
• Retrograde extrapolation. Relating a sample taken hours later back to the time of driving relies on assumptions about absorption and elimination that are open to cross-examination.
• Serious bodily injury. For §49.07, whether the injury meets the statutory definition at all.
• The deadly weapon allegation. Given its effect on both probation eligibility and parole, this is litigated on its own terms, not conceded as a formality.

The licence case runs separately

The criminal case is not the only clock. An administrative licence revocation proceeding follows a refusal or a failed specimen, and the window to request that hearing is short and independent of the criminal court's schedule. Missing it forfeits the hearing without affecting the criminal case either way. See the ALR hearing deadline.

This page is general legal information about Texas law, not legal advice about your case. Reading it does not create an attorney-client relationship. Laws change, so confirm the current rule with a licensed Texas criminal defense attorney about your specific facts. Request a free, confidential case review.