Texas Federal DWI Defense

The Assimilative Crimes Act: How Federal DWI Works

18 U.S.C. §13 provides that whoever within or upon any federal enclave is guilty of any act or omission which, although not made punishable by any enactment of Congress, would be punishable if committed within the jurisdiction of the state in which such place is situated, shall be guilty of a like offense and subject to a like punishment.

The practical effect: a DWI on a military installation in Tarrant County is prosecuted using Texas Penal Code §49.04, but in federal court rather than the Tarrant County courts where Tarrant County DWI cases are heard. The federal magistrate judge presiding over the case is applying Texas DWI law. The government’s burden of proof is the same. The BAC threshold (0.08% per se, or impairment regardless of BAC) is the same. The available defenses are the same.

What changes is the procedural setting. Federal court procedures, federal rules of evidence, and federal sentencing provisions govern how the case moves through the system.

Where Federal DWI Charges Arise in North and Central Texas

The following federal properties within the DGL service area generate federal DWI charges:

• Naval Air Station Joint Reserve Base Fort Worth (NAS JRB): One of the largest joint reserve bases in the country, located in Fort Worth. Offenses on base property are prosecuted in the Northern District of Texas.

• Fort Hood: The large Army installation near Killeen in Bell County. Within the Western District of Texas.

• Dyess Air Force Base: Abilene. Northern District of Texas.

• Sheppard Air Force Base: Wichita Falls. Northern District of Texas.

• Lake Texoma and other Army Corps of Engineers recreation areas: Federal land along major reservoir shorelines generates DWI enforcement, particularly on holiday weekends.

• National Park Service lands: Including portions of the Guadalupe Mountains and Big Bend (Western District) and national recreation areas.

• Other federal enclaves: Federal buildings, post offices, VA medical centers, and other federally owned property can fall under the Assimilative Crimes Act if a DWI occurs on the property itself.

Penalties for Federal DWI Under the Assimilative Crimes Act

Because federal DWI assimilates Texas law, the penalty structure mirrors the Texas DWI penalty structure for the equivalent offense level:

• First offense (Class B misdemeanor): Up to 6 months in federal custody, fine up to $5,000 under federal sentencing, and the Texas-equivalent penalties assimilated through the ACA. Probation is available.

• Second offense: Enhanced penalties consistent with the Texas second-offense Class A misdemeanor structure.

• Third offense (felony): Federal felony treatment consistent with the Texas third-offense felony structure.

• DWI with child passenger, intoxication assault, intoxication manslaughter: Each of these Texas offense-level escalations is assimilated into the federal prosecution at the equivalent level.

Federal misdemeanor DWI cases are typically heard by a United States Magistrate Judge rather than a District Court Judge. The defendant has the right to have the case heard by a District Court Judge if they request it, which may affect the strategic posture of the case.

The ALR Process and License Consequences

One procedurally significant difference between state and federal DWI cases is the Administrative License Revocation process. In a Texas state DWI case, the arresting officer issues a DIC-25 notice, triggering the 15-day ALR deadline. In a federal DWI case on federal property, the Texas DPS ALR process may not be automatically triggered in the same way.

However, a federal DWI conviction will be reported to Texas DPS and will result in license consequences consistent with the Texas offense level assimilated by the ACA. The specific mechanism for license suspension in federal DWI cases should be evaluated at the outset of representation. The absence of an automatic ALR notice does not mean there are no license consequences.

The Forensic Science Defense in Federal DWI Cases

The forensic science challenges available in a federal DWI case are the same as in any Texas DWI prosecution, because the same Texas DWI law is being applied:

Breath testing. The Intoxilyzer 9000 calibration records, observation period compliance, partition ratio variability (1,100:1 to 3,400:1 across the population), and instrument-specific maintenance history are all subject to challenge. Breath test challenges in federal court proceed under the federal rules of evidence, which generally follow the same principles as Texas evidentiary rules for scientific evidence.

Blood draws. Chain of custody from collection through laboratory analysis, GC-FID methodology (for ethanol), in vitro fermentation from improper storage, sodium fluoride preservative adequacy, and analyst qualifications are all subject to independent review. A blood draw performed by a military medical facility or federal agent rather than a civilian medical professional may have different chain of custody documentation that warrants specific examination.

Field sobriety tests. SFST administration on federal property may involve military law enforcement or federal park rangers rather than Texas peace officers. The same NHTSA protocol applies regardless of who administered the tests. Deandra Grant is a trained SFST instructor (she administers and grades the ACS-CHAL Forensic Lawyer-Scientist and DUIDLA Board Certification exams) which means SFST cross-examination goes to the specific protocol deviations, not just whether the officer was certified.

Retrograde extrapolation. The same Widmark formula, elimination rate variability, and rising BAC defense analysis that applies in state court applies in federal court. The pharmacokinetic challenge requires the same graduate-level pharmaceutical science training regardless of the forum.

Why Deandra Grant Law for Federal DWI Defense

• ACS-CHAL Forensic Lawyer-Scientist — both Deandra Grant and Douglas Huff. The forensic science challenge in a federal DWI case is identical to state court.

• Master’s Degree in Pharmaceutical Science + Graduate Certificate in Forensic Toxicology. Retrograde extrapolation, partition ratio analysis, blood specimen methodology.

• Trained SFST Instructor. SFST cross-examination goes to the protocol, not just the certification.

• Federal court experience. James Lee Bright is admitted in all four Texas federal districts. Federal DWI cases in North Texas are heard in the Northern District of Texas.

• 30+ years of DWI defense across North and Central Texas. 500+ trials to verdict.

• 17 published law books. Including The Texas DWI Manual.

• Texas Super Lawyer since 2011. AV® Preeminent rated by Martindale-Hubbell®.

If you are facing a DWI charge on federal property in North or Central Texas, call (214) 225-7117 for a free, confidential consultation. Or schedule online at texasdwisite.com.