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

Blood Draw Warrants in Texas DWI Cases: When They Are Valid, When They Are Not, and What Happens to the Evidence

Blood Draw Warrants in Texas DWI Cases: When They Are Valid When They Are Not and What Happens to the Evidence

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist You refused the breath test. You thought that was the end of it. Twenty minutes later, an officer tells you a judge has signed a warrant and a nurse is going to draw your blood whether you agree or not. This is not uncommon in […]

Intoxication Manslaughter in Texas: What §49.08 Actually Requires and How These Cases Are Defended

Intoxication Manslaughter in Texas: What §49.08 Actually Requires and How These Cases Are Defended

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist An accident happens. Someone dies. A blood draw shows a BAC above 0.08. By the time the investigation is complete, a driver who may have had no intent to harm anyone is facing a second-degree felony charge that carries up to 20 years in state […]

Second DWI in Texas: What the Charge Actually Means and Why Your First Case Still Matters

Second DWI in Texas: What the Charge Actually Means and Why Your First Case Still Matters

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist If you are facing a second DWI charge in Texas, the first thing you need to understand is that the prior offense (even if it happened years ago, even if you received deferred adjudication and thought it was behind you) is now fully back in […]

Rising Blood Alcohol Defense in Texas DWI Cases

Rising Blood Alcohol Defense in Texas DWI Cases

In Texas, a driver can be charged with DWI if their blood alcohol concentration reaches 0.08 percent or higher at the time of testing. What many people do not realize is that alcohol takes time to absorb into the bloodstream. This delay can create a situation where a driver was under the legal limit while […]

Under Investigation for Murder in Texas? How the Grand Jury Process Works — and How a Defense Packet Can Change the Outcome

Under Investigation for Murder in Texas

If you or someone you know has been arrested for murder in Texas, or if law enforcement has indicated that a murder investigation is underway, the period between the arrest and a formal indictment is one of the most consequential (and most often wasted) windows in the entire case. This is when the grand jury […]

Welcoming Attorney Jada Fairley: A Passionate Advocate for Justice in Texas

Welcoming Attorney Jada Fairley: A Passionate Advocate for Justice in Texas

In the ever-evolving landscape of Texas criminal defense, strong advocates make all the difference for individuals navigating the justice system. Our firm is proud to welcome Attorney Jada Fairley, a dedicated and driven legal professional whose passion for defending others is rooted in purpose, compassion, and experience. Her arrival marks a meaningful addition to our […]

DWI on Federal Property in Texas: The Assimilative Crimes Act, the Federal Court Process, and Why This Case Requires a Different Kind of Defense

DWI on Federal Property in Texas: The Assimilative Crimes Act the Federal Court Process and Why This Case Requires a Different Kind of Defense

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist If you were arrested for driving while intoxicated on a military base, in a national park, at a federal courthouse, on a Veterans Affairs campus, or on any other property owned or controlled by the United States government in Texas, your case is not a […]

Rae Carruth: From NFL Promise to a Murder Conspiracy

Rae Carruth: From NFL Promise to a Murder Conspiracy

By Deandra Grant & Griffin Grant Welcome to The Defense File where we examine the criminal cases of public figures through the lens of Texas criminal law. Each entry looks at what happened in court, what the defense argued, and what a defendant would have faced (and how they might have been defended) if the […]

Richard Sherman: NFL Star’s Legal Challenges

Richard Sherman: NFL Star’s Legal Challenges

By Deandra Grant & Griffin Grant Welcome to The Defense File where we examine the criminal cases of public figures through the lens of Texas criminal law. Each entry looks at what happened in court, what the defense argued, and what a defendant would have faced (and how they might have been defended) if the […]

Ryan Malone: NHL Star’s Legal Troubles and Redemption

Ryan Malone: NHL Star’s Legal Troubles and Redemption

By Deandra Grant & Griffin Grant Welcome to The Defense File where we examine the criminal cases of public figures through the lens of Texas criminal law. Each entry looks at what happened in court, what the defense argued, and what a defendant would have faced (and how they might have been defended) if the […]