Knowledge Vault Blog

The Knowledge Vault Blog

Forensic Science. Criminal Defense Strategy. The Law Behind the Law.

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Welcome to the Knowledge Vault Blog — where the attorneys, scientists, and forensic experts at Deandra Grant Law share what we know. This is not a typical law firm blog. It is a research library built by practitioners who teach forensic science courses, grade certification exams, and testify as experts in courtrooms across Texas.

Our Managing Partner, Deandra Grant, holds a Master’s Degree in Pharmaceutical Science, teaches the ACS-CHAL Forensic Lawyer-Scientist courses at Axion Analytical Labs, serves on the faculty of the Borkenstein Drug Course at Indiana University, and chairs the DUI Defense Lawyers Association’s national Board Certification program. She is a member of the American Academy of Forensic Sciences, the American Chemical Society, the Society of Toxicology, and the International Association of Forensic Science Consultants. Partner Douglas Huff brings ACS-CHAL credentials and Garrett Discovery digital forensics training. Federal Defense Attorney James Lee Bright contributes decades of experience in federal criminal practice.

Inside the Knowledge Vault you will find:

Hot Takes – The latest on high profile trials, changes to the law, rulings by the Supreme Court and forensic science news.

Forensic Science & DWI Defense — Deep analyses of blood and breath testing science, GC-FID instrument calibration, partition ratio variability, in vitro fermentation, retrograde extrapolation, and the pharmacokinetics of drug impairment. Written by attorneys who don’t just challenge the science — they teach it.

Field Sobriety Test Analysis — The history, validation research, and scientific limitations of the NHTSA Standardized Field Sobriety Tests, written by a certified SFST Instructor who was the first attorney in Texas to pass the Forensic Sobriety Assessment Certification exam.

Federal Criminal Defense — Guides to federal conspiracy, sentencing guidelines, proffer sessions, grand jury investigations, asset forfeiture, and the critical differences between state and federal prosecution. Written by attorneys who practice in federal courts across Texas.

Digital Forensics & Electronic Evidence — How cell phone location data, social media records, body cameras, call detail records, and computer forensics affect criminal cases — and how to challenge them.

Sex Crime Defense — Outcry witnesses, SANE exams, DNA evidence challenges, false accusations, registry implications, and defense strategies for the most serious allegations.

Emerging Science & Policy — Roadside cannabis testing technology, marijuana rescheduling and federal sentencing, Canadian travel after DWI, and the evolving intersection of science, law, and public policy.

Texas Criminal Courts & Local Practice — County-by-county courts guides, DA office profiles, courthouse walkthroughs, and city-specific enforcement patterns across Dallas, Collin, Denton, Tarrant, Rockwall, and McLennan counties.

Every article in the Knowledge Vault is written or reviewed by the attorneys at Deandra Grant Law.

We don’t publish filler. We publish the analysis we wish existed when we were building our own expertise and the information our clients deserve to have access to before they walk into a courtroom.

If you are facing criminal charges or a DWI in Texas and want to speak with the attorneys behind this work, call (214) 225-7117 or visit our Schedule an Appointment page for a free, confidential consultation.

Knowledge Vault Blog

Douglas Huff’s DWI Article in Attorney at Law Magazine

Attorney Huff Featured in Voice for the Defense

Douglas Huff, a partner at Deandra Grant Law – Criminal & DWI Defense, recently published the article “Texas DWI Superfines” in Attorney at Law Magazine. In it, he discusses the impact of the state’s decision to remove the DWI Surcharge in 2019, due to the repeal of the Texas Driver Responsibility Program. This surcharge used […]

Can You Get a Texas DWI in a Self-Driving Car?

Can You Get a Texas DWI in a Self-Driving Car

By Deandra Grant | Deandra Grant Law | Dallas, Texas The short answer is yes and for most vehicles currently on Texas roads marketed as “self-driving,” the legal analysis is straightforward. What makes the question more interesting is understanding exactly why, what Texas law says about automated vehicles, and where the defense questions actually arise […]

Attorney Deandra M. Grant Selected to 2021 Texas Super Lawyers List

Attorney Deandra M. Grant Selected to 2021 Texas Super Lawyers List

We are thrilled to announce that Attorney Deandra M. Grant was selected to the 2021 Texas Super Lawyers list. This is her eighth year in a row being included in the list and her tenth time receiving the award. She was also a Texas Super Lawyers honoree in 2011 – 2012 and 2014 – 2020. Being chosen […]

Firm Name Changed to Deandra Grant Law – Criminal & DWI Defense

Deandra Grant

We are excited to announce that our firm’s name has changed from Hamilton Grant PC to Deandra Grant Law – Criminal & DWI Defense. The update reflects the structure of our teams in our North, East, and South Texas, which are led by Attorney Deandra Grant. Our name has changed, but our level of service has not. We […]

Attorney Grant Featured in Living Magazine

Attorney Grant Is Attorney at Law Magazine's New Local Legal Authority in DWI for Collin, Dallas, and Denton Counties

We are excited to announce that Attorney Deandra M. Grant was featured in Living Magazine. The May 2021 issue included a special section on leading women, and Attorney Grant appeared on the cover. The feature discusses the path Attorney Grant took to becoming a nationally recognized and premier DWI defense attorney. The spark was first ignited when she […]

Attorney Huff Featured in Voice for the Defense

Attorney Huff Featured in Voice for the Defense

We are pleased to announce that Attorney Douglas E. Huff’s article ‘Transportation Code 709.001 DWI Superfines‘ appeared in Voice for the Defense magazine. The feature discusses the repeal of the Texas Driver Responsibility Program (DRP) and the enactment of Transportation Code 709.001. The DRP had assessed a surcharge to those convicted of driving while intoxicated offenses committed before September 1, […]

Attorney Grant Guest Contributor for Attorney at Law Magazine

Attorney Grant Guest Contributor for Attorney at Law Magazine

We are happy to share that Attorney Deandra M. Grant was a guest contributor to Attorney at Law Magazine Dallas. Her article, titled ‘COVID Implications for the Criminal Justice System,’ appeared in Vol. 8 Issue No. 1 of the publication and was posted online on March 10, 2021.The article discusses how the COVID pandemic has changed the handling […]

Attorney Deandra M. Grant Featured in Living Well Magazine

Attorney Grant Is Attorney at Law Magazine's New Local Legal Authority in DWI for Collin, Dallas, and Denton Counties

We’re proud to share that Attorney Deandra M. Grant was featured in the March/April 2021 issue of Living Well magazine. The article discusses Deandra’s path to her current role as a partner at Deandra Grant Law – Criminal & DWI Defense. The feature notes Deandra’s early career aspiration of becoming a vet. When she got to law […]

Deandra M. Grant Featured as Attorney of the Month by “Attorney at Law Magazine”

Attorney Grant Guest Contributor for Attorney at Law Magazine

We are pleased to share that Deandra M. Grant has been named Attorney of the Month by Attorney at Law Magazine. The featured story on Attorney Grant highlights her skillsets and personal qualities – the characteristics that differentiate her from others and allow her to provide superior legal representation for DWI and criminal defense matters in Dallas. The article recognizes that her […]

What Is BAC, and How Is It Determined?

What Is BAC and How Is It Determined?

BAC stands for blood alcohol concentration. It’s a measurement of how much alcohol is in your bloodstream, and is expressed as milligrams of alcohol per milligrams of blood. A BAC test may reveal that you have an alcohol concentration of .10%, meaning that you have 1 part alcohol per 1,000 parts blood. Generally, the BAC percentage […]