Rowlett DWI and Criminal Defense Lawyers

Rowlett is a Dallas County city of approximately 68,000 residents located along I-30 east of Garland on the eastern shore of Lake Ray Hubbard, with a small portion extending into Rockwall County. The Rowlett Police Department enforces DWI and criminal laws along I-30, SH-66, Miller Road, and Dalrock Road. Every criminal and DWI case arising from Rowlett is prosecuted by the Dallas County District Attorney’s office and heard at the Frank Crowley Courts Building.

Deandra Grant Law’s Dallas office at 3300 Oak Lawn, Ste 700 which is minutes from the Frank Crowley Courts Building. For cases prosecuted in Rockwall County our office is 3 minutes from the Rockwall County Courthouse at 1101 Ridge Road, Suite 201.

Managing Partner Deandra Grant holds a Master’s Degree in Pharmaceutical Science, a Graduate Certificate in Forensic Toxicology, and the ACS-CHAL Forensic Lawyer-Scientist designation. Partner Douglas Huff holds the same ACS-CHAL designation and has completed advanced digital forensics training. For federal matters in the Northern District of Texas, Of Counsel James Lee Bright brings more than 25 years of federal trial experience.

Deandra Grant Law – Criminal & DWI Defense Helps Residents Across Texas with Criminal and 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, Royse City, Southlake, Sunnyvale, The Colony, Waco, and Weatherford.

Why the Science Behind Your Case Matters

Most defense attorneys challenge DWI and criminal evidence through legal argument. Deandra Grant Law challenges it through the science.

• Blood testing: Texas DPS Crime Lab in Garland for most Rowlett PD arrests. GC-FID methodology, in vitro fermentation, sodium fluoride adequacy, chain of custody, analyst qualifications 
• Drug cases: DPS Austin, Armstrong Forensic Laboratory, or NMS for drug analysis. Presence is not impairment. 
• Breath testing: Intoxilyzer 9000. Partition ratio variability (1,100:1 to 3,400:1), 15-minute observation period compliance, calibration records, mouth alcohol, GERD/diabetes effects.
• Field sobriety tests: Deandra Grant is a trained SFST instructor who administers and grades the ACS-CHAL Forensic Lawyer-Scientist and DUIDLA Board Certification exams. SFST cross-examination goes to the protocol, not just the result.
• Digital evidence: Cell phone data, social media, CDR records, surveillance footage 
• Retrograde extrapolation: Rising BAC defense, Widmark formula, individual elimination rate variability 

Dallas County Courts and Enforcement

Courthouse: Frank Crowley Courts Building, 133 N. Riverfront Blvd., Dallas, TX 75207.

District Attorney: The majority of Rowlett lies in Dallas County and is prosecuted by the Dallas County DA’s office. Cases from the small Rockwall County portion go to the Rockwall County Courthouse.

Federal cases: Dallas County is in the Northern District of Texas. Attorney James Lee Bright handles federal defense in the Northern District.

Enforcement in Rowlett

• Rowlett Police Department
• Dallas County Sheriff’s Office
• Texas DPS Troopers (I-30, SH-66)

DWI Penalties in Texas

• First offense (Class B): Up to 180 days jail, fine up to $2,000, license suspension up to 1 year. Deferred adjudication may be available in some first-time cases — eligibility is fact-specific.
• BAC 0.15+ (Class A): Up to 1 year jail, fine up to $4,000, mandatory ignition interlock. Permanent conviction.
• Second offense (Class A): 72-hour minimum jail as COP, up to 1 year, fine up to $4,000, mandatory interlock.
• Third offense (felony): 2–10 years prison, fine up to $10,000, 10-day minimum jail as COP.
• DWI with child passenger: State jail felony, 180 days–2 years, fine up to $10,000.
• Intoxication assault: Third-degree felony, 2–10 years, fine up to $10,000.
• Intoxication manslaughter: Second-degree felony, 2–20 years. Bentley’s Law restitution applies if victim was a parent of minor children.

Criminal Defense in Dallas County

Every criminal defense in Dallas County begins with Texas Code of Criminal Procedure Article 38.23 which is the exclusionary rule with no good faith exception. An unlawful stop, a defective warrant, a search beyond its scope: any of these suppresses the evidence driving the prosecution’s case.

We handle the full range of criminal charges arising from Rowlett and Dallas County:

• Assault and family violence — including the permanent consequences of the family violence affirmative finding
• Drug possession and delivery — lab analysis challenged at the chemistry level
• Theft, robbery, fraud, and white-collar offenses
• Gun crimes — UCW, felon in possession, federal firearms charges
• Sex offenses — forensic evidence and digital evidence examined independently
• Murder and homicide — through capital murder
• Federal criminal defense — Northern District of Texas, handled by James Lee Bright

Why Choose Deandra Grant Law in Rowlett

• Dallas office minutes from Frank Crowley. 3300 Oak Lawn, Ste 700
• 30+ years in Dallas County courts. 500+ trials to verdict statewide
• ACS-CHAL Forensic Lawyer-Scientist — both Deandra Grant and Douglas Huff. 
• Master’s Degree in Pharmaceutical Science + Graduate Certificate in Forensic Toxicology. Science-based challenges to blood, breath, and drug evidence that go beyond legal argument.
• Trained SFST Instructor. 
• 17 published law books. Including The Texas DWI Manual.
• Texas Super Lawyer since 2011. AV® Preeminent rated by Martindale-Hubbell®.
• Federal defense. James Lee Bright — Northern District of Texas.

If you have been arrested for DWI or are facing criminal charges in Rowlett or anywhere in Dallas County, call (214) 225-7117 for a free, confidential consultation. Or schedule online at texasdwisite.com. The 15-day ALR deadline may already be running.