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Texas Intoxication Manslaughter Lawyers

Navigating Intoxication Manslaughter Charges in Texas: Your Path to Defense

Intoxication manslaughter is one of the most technically demanding charges in Texas criminal defense. An accident happens. Someone dies. A blood draw shows a BAC above 0.08. The prosecution does not have to prove you intended to cause harm. They do not have to prove you were driving recklessly. They only have to prove you were intoxicated and that your intoxication caused the death. Everything else (the other driver’s conduct, the road conditions, the quality of the blood evidence) is defense territory.

Managing Partner Deandra Grant brings more than 30 years of DWI defense experience, a Master’s Degree in Pharmaceutical Science, and the ACS-CHAL Forensic Lawyer-Scientist designation to every intoxication manslaughter case. These are not credential footnotes. They are the scientific foundation from which blood evidence is evaluated, crash reconstruction is challenged, and causation is contested.

Deandra Grant Law – Criminal & DWI Defense Helps Residents Across Texas with DWI Defense – Including: Allen , Arlington, Belton, Cleburne, Collin County, Dallas, Denton, Fairview, Fort Worth, Frisco, Gainesville, Granbury, Hood County, Johnson County, Lewisville, Little Elm, McKinney, Park Cities, Parker County, Plano, Princeton, Richardson, Rockwall, Rowlett, Royse City, Southlake, Sunnyvale, The Colony, Waco, and Weatherford.

What the Statute Requires: §49.08

Texas Penal Code §49.08 defines intoxication manslaughter as operating a motor vehicle while intoxicated and by reason of that intoxication causing the death of another person by accident or mistake. Every element must be proven beyond a reasonable doubt: operation, public place, intoxication, and causation.

Intoxication.  Under §49.01, intoxication means either a BAC of 0.08 or above at the time of driving, or the loss of normal use of mental or physical faculties by reason of alcohol, a drug, or a controlled substance. This is a two-prong definition: the prosecution may proceed under either or both prongs. A driver can be charged with intoxication manslaughter even if the blood result is below 0.08, if the loss-of-normal-use prong is supported by officer observations and other evidence.

Causation — the central battleground.  The prosecution must prove that the defendant’s intoxication (not merely their presence at the scene or their operation of a vehicle) caused the death. A driver with a 0.09 BAC who is rear-ended at a green light by a driver who ran a red light is present, is operating a vehicle, and is arguably intoxicated, but the cause of the collision and the death was the other driver’s traffic violation, not the first driver’s BAC. Concurrent causation, third-party fault, and independent crash reconstruction are all tools the defense uses to contest the causation element.

No recklessness required.  Unlike traditional manslaughter under §19.04, intoxication manslaughter does not require proof of recklessness. A driver who was intoxicated and caused a fatal accident through ordinary negligence can be convicted. This strict-liability-adjacent structure is what makes the causation analysis so critical.

Penalties and the Enhancement for Protected Victims

Intoxication manslaughter is a second-degree felony carrying 2 to 20 years in state prison and a fine up to $10,000. If the deceased was a peace officer, firefighter, judge, or emergency medical services employee performing official duties, the charge is enhanced to a first-degree felony carrying 5 to 99 years or life.

Effective September 1, 2023, Texas added a mandatory financial consequence under Texas Code of Criminal Procedure Article 42.0375 — known as Bentley’s Law. When a defendant is convicted of intoxication manslaughter and the deceased was the parent of a minor child, the court must order monthly child support restitution for that child until they turn 18 or graduate high school. Payments are deferred during incarceration but are not waived. They begin within one year of release and include any arrearage accumulated during imprisonment. The age and number of the victim’s minor children is a factor that belongs in any honest assessment of a plea decision.

How the Defense Is Built

Independent Crash Reconstruction

The state’s investigators produce a crash reconstruction report. The defense retains an independent expert to evaluate the methodology, measurements, physical evidence, and conclusions. Skid mark analysis, point of impact determination, vehicle speed calculation, and fault attribution all involve technical judgment that can be challenged when the underlying data does not support the conclusions.

Third-Party Fault

Evidence that another driver violated a traffic law, was distracted, or created the dangerous condition that led to the collision is directly relevant to causation. This evidence must be developed and preserved early. Witness memories fade and surveillance footage is overwritten.

Event Data Recorder Evidence

Modern vehicles capture pre-crash vehicle speed, brake application, throttle position, steering angle, and seatbelt status in the seconds before a collision. This data is often more reliable than eyewitness accounts or post-hoc reconstruction and can establish exactly what the defendant’s vehicle was doing when the crash occurred. It must be preserved immediately after arrest.

The Blood Evidence

Blood draws in intoxication manslaughter cases are warrant-authorized and analyzed by forensic toxicology laboratories: SWIFS or DPS in Dallas County, TCME or the Fort Worth Crime Lab in Tarrant County, DPS labs elsewhere. Evaluating whether a blood result accurately reflects the defendant’s BAC at the time of driving (rather than hours later at the time of the draw) requires pharmacokinetic analysis and retrograde extrapolation methodology. Learn more about blood test defense in DWI cases.  

The Constitutional Foundation

Under Texas Code of Criminal Procedure Article 38.23, evidence obtained through a constitutionally defective warrant is suppressible. Texas has no good faith exception. The validity of the blood draw warrant (whether the affidavit accurately stated the facts and whether those facts established probable cause) is one of the first questions in every intoxication manslaughter defense.

The Grand Jury and the Timeline

Intoxication manslaughter is a felony. The prosecution must obtain a grand jury indictment before the case can proceed to trial. A well-prepared defense packet submitted before grand jury presentment may influence whether an indictment issues and what charge is presented. The investigation that will determine the defense (crash reconstruction, blood evidence, witness accounts) is happening right now. Acting immediately is not optional.

Speak With Deandra Grant Law

Intoxication manslaughter cases require simultaneous defense on multiple fronts: the constitutional validity of the blood draw, the forensic accuracy of the BAC result, the scientific foundation of the crash reconstruction, and the legal sufficiency of the causation theory. Deandra Grant Law has offices in Dallas, Fort Worth, Allen, Denton, Waco, and Rockwall. We have appeared in North and Central Texas courts for more than 30 years, across more than 500 trials to verdict.

Call (214) 225-7117 for a confidential consultation. The investigation is happening now. Don’t wait.