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

CDL DWI in Texas: What Commercial Drivers Need to Know

What Commercial Drivers Need to Know

For a CDL holder, a DWI arrest is not just a criminal matter. It is a career emergency. The administrative consequences (CDL disqualification) move faster than the criminal case, there is no occupational license available to preserve your ability to drive commercially during the disqualification period, and the BAC threshold that triggers the violation is […]

Social Media and Your Texas DWI Case: What the Evidence Actually Shows

Social Media and Your Texas DWI Case What the Evidence Actually Shows

Every criminal defense attorney will tell you to stop posting on social media after a DWI arrest. That advice is correct. But it’s the beginning of the conversation, not the end of it and most attorneys stop there because they don’t have the forensic training to go any further. Partner Douglas Huff has completed advanced […]

Drug Delivery and Distribution Charges in Texas: How the State Builds the Case and Where the Defense Challenges It

Drug Delivery and Distribution Charges in Texas How the State Builds the Case and Where the Defense Challenges It

The difference between a drug possession charge and a drug delivery charge in Texas is not just the severity of the offense. It is often the difference between a misdemeanor and years in prison. Manufacture or delivery of a controlled substance in Penalty Group 1 starts at a state jail felony for less than one […]

Deandra Grant Published in Counterpoint: The Journal of Science & the Law

Deandra Grant Published in Counterpoint: The Journal of Science & the Law

Deandra Grant, Managing Partner of Deandra Grant Law, has authored a two-part series on retrograde extrapolation published in Counterpoint: The Journal of Science & the Law. Counterpoint is an internationally indexed scientific journal (ISSN 2369-2774) covering the intersection of forensic science and criminal law, and is read by DUI defense attorneys, forensic scientists, and legal […]

When Restraining a Student Becomes a Criminal Charge: What Texas Teachers Need to Know About Injury to a Child

When Restraining a Student Becomes a Criminal Charge

A veteran teacher with twenty-something years in the classroom, no disciplinary history, no prior criminal record. A student in crisis who is physically dangerous, injuring themselves or others and beyond the reach of verbal de-escalation. The teacher intervenes physically. Someone gets hurt. And then, weeks or months later, there is a criminal charge: injury to […]

THC Redistribution: Your Drug Test Came Back Positive for THC But You Haven’t Used Cannabis in Weeks

Your Drug Test Came Back Positive for THC But You Haven’t Used Cannabis in Weeks

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist, and Sol Bobst, Ph.D., DABT, ToxSci Advisors LLC If you are on bond supervision or probation in Texas with a drug testing condition, a positive THC result is not just an administrative inconvenience. It is potential grounds for bond revocation, a probation violation hearing, and […]

When Protest Becomes Terrorism: What the Prairieland Verdict Means for Texas Defendants

When Protest Becomes Terrorism: What the Prairieland Verdict Means for Texas Defendants

On March 13, 2026, a federal jury in Fort Worth returned guilty verdicts against nine defendants connected to a July 4, 2025 incident outside the Prairieland ICE Detention Center in Alvarado, Texas. Eight were convicted of providing material support to terrorists. One (Benjamin Song, a former Marine Corps reservist) was convicted of attempted murder for […]

Why Being Charged Twice Isn’t Double Jeopardy: Luigi Mangione and Parallel State and Federal Prosecutions

Why Being Charged Twice Isn’t Double Jeopardy: Luigi Mangione and Parallel State and Federal Prosecutions

At a February 2026 hearing, Luigi Mangione stood up in a Manhattan courtroom and told the judge: “It’s the same trial twice. One plus one is two. Double jeopardy by any commonsense definition.” He is legally wrong. But he is not wrong that being tried twice for the same conduct is a serious burden. It’s […]

Deferred Adjudication in Texas: What It Is, Who Qualifies, and What Happens to Your Record

Deferred Adjudication in Texas: What It Is Who Qualifies and What Happens to Your Record

Deferred adjudication is one of the most commonly misunderstood options in Texas criminal law. Defendants hear the phrase, assume it means their case goes away, and are surprised later when they discover the record implications are more complicated than they expected. Others assume they are not eligible when they actually are or vice versa. This […]

A Last-Minute Confession Before a Texas Execution: What Does It Take to Stop One?

A Last-Minute Confession Before a Texas Execution What Does It Take to Stop One

James Broadnax was convicted in Dallas County in 2009 for the robbery and murder of two men in Garland. He is scheduled to die by lethal injection on April 30, 2026. His cousin, Demarius Cummings, has submitted a sworn affidavit confessing that he (not Broadnax) was the one who pulled the trigger. Cummings says he […]