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"Deandra Grant Law fights hard for their clients and is always willing to go above and beyond. They are the best firm for DWI cases in DFW and beyond. Definitely hire them to represent you in any pending cases."
- P. Williams
"Deandra Grant made a tough situation so much better. She listened to my concerns and helped me so much with my case. I would recommend her to anyone needing legal services."
- M. Haley
"Deandra Grant Law handled my case with diligence and professionalism. Deandra Grant's reputation is stellar and now I know why. She has a team of individuals who provide quality service."
- N. Coulter
As Seen On
Collin County Criminal Courts Guide
By Attorney Deandra Grant
If you’re facing a criminal charge in Collin County, understanding how the local courts work can make the process far less confusing. This guide explains where cases are heard, what each court handles, and what you can expect as your case moves through the system.
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Allen DWI and Criminal Defense Lawyers
A DWI arrest or criminal charge in Allen sets two things in motion at once: a criminal case and a series of deadlines, decisions, and consequences that begin immediately. Deandra Grant Law’s Allen office at 1333 W. McDermott Drive, Suite 180 is your Collin County home base. We’re located right in the community and minutes from the Russell A. Steindam Courts Building in McKinney, where every Collin County criminal case is heard.
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. For federal matters in the Eastern 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: Austin, 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.
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: DPS Garland lab for alcohol cases. GC-FID methodology, coelution, in vitro fermentation by Candida albicans, sodium fluoride adequacy, chain of custody — all challenged at a scientific level.
- Drug cases: DPS Austin lab, Armstrong Forensic Laboratory, or NMS for drug analysis. Presence is not impairment. Pharmacokinetic analysis is how drug impairment evidence is properly challenged.
- Breath testing: Intoxilyzer 9000. Partition ratio variability (1,100:1 to 3,400:1), 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, metadata — challenged through Doug Huff’s advanced digital forensics training.
- Retrograde extrapolation: Rising BAC defense, Widmark formula, individual elimination rate variability — pharmacokinetic analysis requiring graduate-level pharmaceutical science training.
Collin County Courts and Enforcement
Courthouse: Russell A. Steindam Courts Building, 2100 Bloomdale Rd., McKinney, TX 75071. Collin County has 7 County Courts at Law (misdemeanor) and 15 District Courts (felony). Our attorneys appear in these courts regularly and are familiar with every judge and prosecutor in the building.
Federal cases: Allen and Collin County are in the Eastern District of Texas (Sherman Division). James Lee Bright handles federal defense in the Eastern District.
Enforcement Agencies in Allen
- Allen Police Department — active enforcement on US-75, Exchange Parkway, Bethany Drive, Stacy Road, and the Watters Creek entertainment district
- Collin County Sheriff’s Office
- Texas DPS Troopers (US-75 corridor)
DWI Penalties in Texas
- First offense (Class B): Up to 180 days jail, fine up to $2,000, license suspension up to 1 year.
- BAC 0.15+ (Class A): Up to 1 year jail, fine up to $4,000, mandatory ignition interlock.
- 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.
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Criminal Defense in Collin County
Every criminal defense in Collin 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 that exceeded its scope: any of these can suppress the evidence driving the prosecution’s case. Collin County is an active prosecution jurisdiction. Prosecutors are well-prepared, and the defense has to be more so.
We handle the full range of criminal charges arising from Allen:
- DWI and intoxication offenses — felony DWI, intoxication assault, intoxication manslaughter, defended with forensic science training
- Assault and family violence — including the permanent consequences of the family violence affirmative finding
- Drug possession and delivery — DPS Garland / DPS Austin / Armstrong / NMS lab analysis challenged at the chemistry level
- Sex crimes — sexual assault, aggravated sexual assault, indecency, online solicitation, forensic and digital evidence examined independently
- Murder and homicide — forensic pathology and blood evidence challenges
- Theft, robbery, fraud, and white-collar crimes
- Gun crimes — UCW, felon in possession, federal firearms charges
- Federal criminal defense — Eastern District of Texas, handled by James Lee Bright
Frequently Asked Questions for Those Recently Arrested in Allen, TX
Can I refuse a breath test if stopped in Allen?
Texas implied consent laws create certain consequences for test refusal, including potential license suspension. However, refusing testing eliminates potentially damaging scientific evidence. The strategic implications of refusal should be discussed with qualified counsel.
How accurate are breath tests administered in Allen?
Research indicates breath testing devices may have error rates exceeding 10% under certain conditions. Numerous scientific and procedural factors can affect accuracy.
What should I do immediately after being arrested?
Not necessarily. Texas law allows prosecution based on the “loss of normal mental or physical faculties” regardless of measured alcohol concentration.
Through comprehensive understanding of breath testing limitations and strategic challenge of procedural deficiencies, we develop effective defenses for clients facing breath test evidence in Allen DWI prosecutions.
What should I do immediately after being arrested?
After an arrest, it’s crucial to remain calm and exercise your right to remain silent. Avoid making any statements to law enforcement until you have legal representation.
How can an attorney help me with my case?
An attorney can assess the evidence against you, help build a strong defense strategy, navigate legal procedures, negotiate with prosecutors, and represent you in court if necessary.
What are the potential consequences of the charges I'm facing?
This question often pertains to penalties such as fines, probation, jail time, license suspension, and impact on employment or future opportunities. An attorney can provide insight into the potential outcomes based on your specific circumstances.
Could my charges be dropped or reduced?
Attorneys can analyze the evidence to identify weaknesses in the case, potentially leading to dropped charges or reduced penalties through negotiations with the prosecution.
How can I challenge evidence, such as a breathalyzer or blood test?
An attorney can review the procedures followed during testing, assess whether proper protocols were followed, and determine if the results can be challenged.
Will I have to go to trial?
While not all cases go to trial, an attorney can discuss the likelihood of a trial, explain the process, and help you prepare if your case does proceed to court.
What if I can't afford an attorney?
It’s essential to inquire about the attorney’s fees, payment plans, and whether you might qualify for a court-appointed attorney based on your financial situation.
Why Choose Deandra Grant Law in Allen
- Allen office — your Collin County home base. 1333 W. McDermott Drive, Suite 180. Minutes from the courthouse in McKinney.
- 30+ years in Collin 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.
- Trained SFST Instructor.
- 17 published law books. Including The Texas DWI Manual. All books available on Amazon.
- Texas Super Lawyer since 2011. AV® Preeminent rated by Martindale-Hubbell®.
- Federal defense. James Lee Bright — Eastern District of Texas (Sherman Division).
- Digital forensics.
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If you have been arrested for DWI or are facing criminal charges in Allen or anywhere in Collin 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.
Client Reviews
“Deandra Grant Law – Criminal & DWI Defense handled my case with diligence and professionalism. Deandra Grant’s reputation is stellar and now I know why. She has a team of individuals who provide quality service.”
N. Coulter
(214) 225-7117
Experienced DWI Defense