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

When Drug Distribution Becomes a Homicide Case: Lessons from the Matthew Perry Sentencing

When Drug Distribution Becomes a Homicide Case Lessons from the Matthew Perry Sentencing

On April 8, 2026, U.S. District Judge Sherilyn Peace Garnett sentenced Jasveen Sangha (the Los Angeles drug dealer federal prosecutors called the “Ketamine Queen”) to 15 years in federal prison for distributing the ketamine that killed actor Matthew Perry in October 2023. The sentence was the harshest imposed on any of the five defendants in […]

Criminal Justice Reform in 2026: What It Means for Texas Defendants

Criminal Justice Reform in 2026 What It Means for Texas Defendants

National headlines about criminal justice reform in 2026 tell a story of accelerating bipartisan progress at the state level: more reform laws passed in 2025 than in 2024, and a growing list of policy changes that reformers describe as achievable. The Prison Policy Initiative’s annual guide to winnable reforms identifies 34 specific changes across eight […]

How Do Police Track Your Online Activity And Can That Evidence Be Challenged?

How Do Police Track Your Online Activity And Can That Evidence Be Challenged

Law enforcement agencies have increasingly sophisticated tools for monitoring and documenting internet activity. They can track the websites you visit, the files you download, the searches you perform, and the communications you send often without you knowing. This evidence frequently forms the foundation of criminal cases involving CSAM, online solicitation, fraud, and other internet-related offenses. […]

What to Do if You’re Falsely Accused of Sexual Assault in Texas

What to Do if You’re Falsely Accused of Sexual Assault in Texas

Few things are more terrifying than being accused of something you did not do and few accusations carry more devastating consequences than sexual assault. In Texas, a sexual assault conviction is a second-degree felony punishable by 2 to 20 years in prison. Aggravated sexual assault carries 5 to 99 years or life. And the damage […]

How Killing a Cop Went from Murder to Manslaughter

How Killing a Cop Went from Murder to Manslaughter

A New York jury recently acquitted Guy Rivera of first-degree murder in the 2024 shooting death of NYPD Detective Jonathan Diller during a traffic stop in Queens. Rivera was convicted of manslaughter and weapons charges instead. He faces up to 90 years in prison. When that verdict was reported, the reaction in many corners was […]

How Texas Uses Out-of-State DWI Convictions for Enhancement and How the Defense Challenges Them

How Texas Uses Out-of-State DWI Convictions for Enhancement and How the Defense Challenges Them

Texas Penal Code §49.09 contains two facts that surprise most people who come to us with a prior DWI from another state. First, Texas has no lookback period so a DWI conviction from 30 years ago in another state can still be used to enhance a current Texas charge. Second, the state line provides no […]

What to Do After a DWI Arrest in Texas: A Step-by-Step Guide

What to Do After a DWI Arrest in Texas: A Step-by-Step Guide

A DWI arrest in Texas opens two simultaneous legal proceedings that run on different clocks and have different consequences. The criminal case will take months to resolve. The administrative license revocation (ALR) case can suspend your license in 40 days if you do nothing. The steps you take in the first 15 days after your […]

Underage DWI in Texas: DUI vs. DWI, Deferred Adjudication, and What Parents Need to Know

Underage DWI in Texas DUI vs. DWI, Deferred Adjudication, and What Parents Need to Know

When a minor is stopped for alcohol and driving in Texas, two separate statutes may apply and which one applies determines the offense level, the available penalties, and whether deferred adjudication is even on the table. Most coverage of this topic treats them as the same charge. They are not and confusing them can lead […]

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 […]