Why Hire Us to Defend DWI Cases
Criminal Defense Attorneys Serving Dallas, Forth Worth, Denton, Austin & McKinney
Most criminal defense lawyers do not invest the time and training necessary to defend DWI cases successfully. An attorney needs a great deal of knowledge to discredit the Intoxilyzer 5000 and 9000 in court and to discredit the police officer’s opinion that a person was intoxicated. If the attorney does not understand how the Intoxilyzer works, he or she cannot point out the potential testing errors. In addition, if the attorney doesn’t know the field sobriety tests and the studies that back them up, he or she cannot successfully cross-examine the police officer who administered them.
You need an attorney devoted to this area of the law. Just as you wouldn’t hire a foot doctor to perform heart surgery, you shouldn’t hire a general criminal attorney to defend a DWI case. At Hamilton Grant PC, our Dallas criminal defense attorneys have completed the same DWI testing and training as police officers.
Medical Conditions That Affect the Breath Test
Attorney Deandra Grant knows that multiple factors can affect a breath-test score, the ability to perform the field sobriety tests, and/or the rate at which alcohol is absorbed and eliminated.
These include:
- Surgeries
- Racial heritage
- Prescription or over-the-counter drugs
- Airbag deployment in an accident
- Type of alcohol consumed, rate of consumption, lack of food while drinking, and type of diet
- Diseases and medical conditions
Factors that affect the performance of standard field sobriety tests include:
- Weather
- Wind and dust
- Lights from traffic or squad car
- Fear and nervousness
- Inner-ear problems
- Age
- Injuries to the leg or knee
- Shoes and weight
- Lack of sleep or lack of coordination
Attorney Deandra Grant has completed:
- The Operator and Maintenance Technician course for the Intoxilyzer 5000
- The certification course in the administration of Standardized Field Sobriety Tests
- The Standardized Field Sobriety Testing Instructor course
- The Drug Recognition Expert overview course
- Over 24 hours of training in the drawing and testing of blood samples for use in DWI cases
- The Forensic Chromatography: Theory and Practice course through the American Chemical Society and Axion Labs
We handle a full range of DWI related matters in Texas, including:
- Texas field sobriety tests and drunk driving defense
- Effect of a DWI offense on your criminal record
- Expunction of criminal record
- Petition for non-disclosure
- DWI information on Texas driver's license suspension
Our Dallas attorneys also represent clients in Collin County and throughout Northern Texas.

Real Results
Our Clients' Victories
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.17 Alcohol Level Was Reported Not Guilty
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.17 Breath Test Thrown Breath Score Out
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Arrested for DWI Case Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member Dismissed
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Assault Causing Bodily Injury of a Family Member with Prior Dismissed-No Billed by Grand Jury