Fort Worth Felony DWI Attorneys

Intoxication Manslaughter — Texas Penal Code § 49.08

Under Penal Code § 49.08, a person commits Intoxication Manslaughter by, while intoxicated, causing the death of another by reason of the intoxication.

Penalty Structure

• Second-degree felony.
• 2 to 20 years in TDCJ.
• Fine up to $10,000.
• Mandatory driver’s license suspension.
• Mandatory ignition interlock under CCP Article 17.441.
• § 49.08 is on the CCP Article 42A.054 3g list.
• If a deadly weapon finding is entered, Government Code § 508.145(d) requires the defendant to serve the lesser of half the sentence or 30 years before parole eligibility. On a 20-year sentence with a deadly weapon finding, that means 10 years minimum before parole consideration.

3g Consequences — No Judge-Granted Probation

Because Intoxication Manslaughter is on the 3g list, judge-granted community supervision is not available. Only a jury can recommend probation, and only in limited circumstances. A guilty plea without a jury means mandatory prison. This is one of the most consequential features of any Intoxication Manslaughter case, and it fundamentally shapes the defense strategy.

The Multi-Victim Multiplier

When an Intoxication Manslaughter accident involves multiple deaths, the state can charge one count per victim. Four deaths means four separate second-degree-felony counts, which )if run consecutively) can produce cumulative sentences far longer than any single statutory maximum would suggest.

Mandatory Ignition Interlock — CCP Article 17.441

For every felony DWI case (and for second DWI, BAC 0.15+, DWI with Child Passenger, Intoxication Assault, and Intoxication Manslaughter) Code of Criminal Procedure Article 17.441 requires ignition interlock as a condition of bond. The court has no discretion to waive this requirement absent unusual circumstances. Interlock is also typically required as a condition of any occupational license issued during the suspension period. For felony DWI defendants, interlock is often a multi-year reality.

ALR and Driver’s License Consequences

The Administrative License Revocation process runs in parallel with every felony DWI case:

• Failed test: 90-day ALR suspension on a first failed test; 1 year on a second failed test.
• Refusal: 180-day ALR suspension on a first refusal; 2 years on a repeat refusal.
• Criminal-court license suspension: 1 to 2 years (felony DWI), 90 days to 1 year (DWI with Child Passenger).
• ALR deadline: 15 days from the notice of suspension.

The ALR and criminal-court suspensions run consecutively, meaning a felony DWI case can produce 3 to 4 years of driver’s license consequences even when the criminal case is resolved favorably.

How Felony DWI Cases Are Defended

Attacking the Priors

For § 49.09(b)(2) DWI 3rd cases, a prior that cannot be proved cannot enhance. Challenges to predicate convictions (jurisdiction, defective plea waivers, inadequate admonishments, identity) can reduce a third DWI to misdemeanor treatment. For defendants with very old priors, defective judgment paperwork is a recurring issue.

Forensic Challenges on the Current Case

Ethanol analysis in Texas is performed by headspace gas chromatography with flame ionization detection (GC-FID). Drug analysis is performed by LC-MS/MS. Chain of custody, preservative balance, calibration, column chemistry, and measurement uncertainty are all contestable. 

Causation Challenges on § 49.07 and § 49.08

The “by reason of the intoxication” element on Intoxication Assault and Intoxication Manslaughter is not a given. Accident reconstruction, examination of the other driver’s conduct, and analysis of contributing factors can defeat the causation element even where the intoxication itself is proved.

Fourth Amendment and CCP Art. 38.23 Challenges

Stops, field sobriety testing, arrests, and blood warrants are all subject to constitutional review. Suppression motions frequently dispose of felony DWI cases that would otherwise produce substantial prison sentences.

ALR as Discovery

Requesting the ALR hearing and taking the arresting officer’s testimony under oath months before the criminal case reaches its first setting produces discovery that shapes the criminal defense strategy.

Sentencing Mitigation

Where conviction is likely, the defense shifts to mitigation such as treatment compliance, employment, family responsibilities, and rehabilitation evidence that can produce probation rather than prison, and when prison is unavoidable, a sentence at the lower end of the range. For Intoxication Manslaughter cases, jury-probation advocacy and mitigation investigation are essential.

Where Tarrant County Felony DWI Cases Are Heard

Felony DWI cases in Tarrant County (DWI Third or Subsequent, DWI with Child Passenger, Intoxication Assault, and Intoxication Manslaughter) are filed in the Tarrant County District Courts at the Tim Curry Criminal Justice Center, 401 West Belknap Street, Fort Worth. Tarrant County has 11 felony district courts. The Tarrant County Criminal District Attorney’s Office (led by Phil Sorrells) prosecutes all criminal cases in Tarrant County, both felony and misdemeanor. State appeals go to the Texas Second Court of Appeals in Fort Worth and potentially to the Texas Court of Criminal Appeals.

Frequently Asked Questions

What makes a DWI a felony in Texas?

Four main categories: (1) Third or Subsequent DWI under § 49.09(b)(2) — third-degree felony; (2) DWI with Child Passenger under § 49.045 — state jail felony; (3) Intoxication Assault under § 49.07 — third-degree felony (second-degree if peace officer/firefighter/EMS victim or if TBI resulting in persistent vegetative state); (4) Intoxication Manslaughter under § 49.08 — second-degree felony. Additional enhancements apply under Penal Code § 12.42 when prior penitentiary convictions are present. And since 2023, DWI-related deaths involving fentanyl can be charged as first-degree felony murder under § 19.02(b)(4).

How long do priors count against me?

Forever. Texas repealed its DWI lookback period in 2005 (former § 49.09(e)). A 25-year-old DWI conviction enhances today’s case the same as a 2-year-old one. Out-of-state DUI/OUI/OWI convictions count under § 49.09(c).

Can I get probation on a third DWI?

Yes. Third DWI is not on the § 42A.054 3g list, so judge-granted community supervision is available. However, under Penal Code § 49.09(h), any probation on a third DWI carries a mandatory minimum of 10 days in jail as a condition of probation. The minimum is statutory and not waivable.

Can I get probation on Intoxication Manslaughter?

Only through a jury recommendation. Intoxication Manslaughter under § 49.08 is on the 3g list, which means judge-granted community supervision is not available. A guilty plea without a jury trial means mandatory prison. This fundamentally shapes defense strategy in every § 49.08 case.

What’s the worst-case sentence on a fourth DWI?

Depending on the defendant’s prior felony record, a fourth DWI can be enhanced under Penal Code § 12.42(a) to second-degree felony (2 to 20) or under § 12.42(d) to habitual-offender (25 years to life). Habitual-offender exposure is rare but very real for multi-prior DWI defendants.

What does a “deadly weapon finding” do to my sentence?

If a deadly weapon finding is entered in a 3g case, Government Code § 508.145(d) requires the defendant to serve the lesser of half the sentence or 30 years before parole eligibility. A vehicle can qualify as a deadly weapon in DWI-causing-injury and DWI-causing-death cases. On a 20-year Intoxication Manslaughter sentence with a deadly weapon finding, that means 10 years minimum before parole consideration.

About Deandra Grant Law

Deandra Grant Law is a Texas criminal defense firm with offices in Fort Worth, Dallas, Allen, Denton, Waco, and Rockwall. Our felony DWI practice is deep on the forensic and procedural issues that make the difference in serious DWI cases.

Deandra M. Grant, Managing Partner

• More than 30 years in practice, focused on criminal defense and DWI
• Former prosecutor
• J.D.; M.S. in Pharmaceutical Sciences
• Graduate Certificate in Forensic Toxicology
• ACS-CHAL Forensic Lawyer-Scientist from the American Chemical Society
• Standardized Field Sobriety Test (SFST) Instructor
• Texas Super Lawyer since 2011
• Author of 17 law books including The Texas DWI Manual
• AV Preeminent rated by Martindale-Hubbell
• Executive Director, DUI Defense Lawyers Association (DUIDLA)

Douglas E. Huff, Partner

• ACS-CHAL Forensic Lawyer-Scientist
• Digital forensics and electronic evidence training
• Extensive Texas trial experience

James Lee Bright, Of Counsel

• National federal criminal defense practice
• Admitted to all four Texas federal districts (including the Northern District of Texas, which covers Tarrant County), the District of Columbia, the Fifth Circuit Court of Appeals, and the Supreme Court of the United States

Contact Our Fort Worth Felony DWI Attorneys

If you or someone you love has been charged with felony DWI in Tarrant County, the time to build a defense is now. Blood samples can be re-tested. Warrants can be challenged. Witnesses’ memories are fresher than they ever will be again. The decisions made in the first weeks after arrest often determine the result of the case.

Call Deandra Grant Law at (214) 225-7117 to schedule a consultation. We serve Fort Worth, Arlington, North Richland Hills, Mansfield, Southlake, Grapevine, and all of Tarrant County from our Fort Worth office.