Knowledge Vault Blog

The Knowledge Vault Blog

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

View Blog Posts

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

Good Behavior After the Fact: How New Federal Sentencing Proposals Could Help Your Case

Good Behavior After the Fact: How New Federal Sentencing Proposals Could Help Your Case

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist If you are facing federal criminal charges right now, or if you have already been charged and are waiting for sentencing, there is a development at the United States Sentencing Commission that could directly affect your case. And unless your defense attorney is tracking it, […]

Afroman, Lemon Pound Cake, and the American Instinct to Root for the Little Guy

Afroman Lemon Pound Cake and the American Instinct to Root for the Little Guy

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist In August 2022, Adams County sheriff’s deputies in rural Ohio kicked down Afroman’s front door with guns drawn, tore through his house, cut his security camera wires, seized over $5,000 in cash, and left. They had a warrant for drug trafficking and kidnapping. They found […]

Why Lab Accreditation Does Not Guarantee Your Test Results Are Correct

Why Lab Accreditation Does Not Guarantee Your Test Results Are Correct

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist When a forensic laboratory analyst takes the stand in a DWI or drug case, one of the first things the prosecution establishes is that the laboratory is “accredited.” The word is deployed like a seal of infallibility: the lab is accredited, therefore the results are […]

Smart Glasses in the Courtroom: What a UK Case Means for Digital Evidence and Criminal Defense in Texas

Smart Glasses in the Courtroom: What a UK Case Means for Digital Evidence and Criminal Defense in Texas

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist A UK High Court judge recently caught a litigant receiving real-time coaching through smart glasses while being cross-examined. The man, co-owner of a Lithuanian company trying to get his firm off an insolvency list, was wearing glasses that were connected to his phone via Bluetooth. […]

Drug Recognition Experts: What They’re Trained to Do, What They Actually Can Do, and Where the Science Falls Short

Drug Recognition Experts: What They're Trained to Do What They Actually Can Do and Where the Science Falls Short

When a police officer suspects a driver is impaired by drugs rather than alcohol, a specialized officer called a Drug Recognition Expert (DRE) may be called to the scene or the station to conduct a Drug Influence Evaluation (DIE). The DRE follows a 12-step protocol and, at its conclusion, renders an “opinion” about which category […]

A Texas DWI and Traveling to Canada in 2026: A Cross-Border Guide from a Texas Defense Attorney and a Canadian Defence Lawyer

A Texas DWI and Traveling to Canada in 2026: A Cross-Border Guide from a Texas Defense Attorney and a Canadian Defence Lawyer

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), Deandra Grant Law, Dallas, Texas and Kyla Lee, Acumen Law Corporation, Vancouver, British Columbia One of the most common questions DWI defense attorneys in the United States hear from clients has nothing to do with courtrooms or probation. It’s this: “Will I still be able to go to […]

Car Accident Claims in Texas: The Legal Framework, the Insurance Reality, and What Actually Determines Your Case’s Value

Car Accident Claims in Texas: The Legal Framework, the Insurance Reality, and What Actually Determines Your Case’s Value

By Deandra Grant Law Texas leads the nation in traffic fatalities and has more vehicle miles traveled than any other state. In 2024, the Texas Department of Transportation reported over 4,000 traffic deaths and hundreds of thousands of injury crashes statewide, with Dallas–Fort Worth consistently ranking among the most dangerous metropolitan areas for drivers. If […]

Roadside Cannabis Testing in 2026: The Science, the Devices, and What’s Actually Ready for the Courtroom

Roadside Cannabis Testing in 2026: The Science, the Devices, and What’s Actually Ready for the Courtroom

By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist, and Sol Bobst, Ph.D., DABT, ToxSci Advisors LLC As cannabis legalization expands across the United States, law enforcement agencies are searching for a reliable way to detect recent cannabis use at the roadside. The goal is understandable: impaired driving kills people, and officers need tools. […]

The Standardized Field Sobriety Tests: A Critical History of the Science Behind the Roadside Exercises That Decide Your Freedom

The Standardized Field Sobriety Tests: A Critical History of the Science Behind the Roadside Exercises That Decide Your Freedom

By Deandra Grant, J.D., G.C., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist, SFST Instructor Every DWI arrest in America follows essentially the same script. An officer pulls you over, asks if you’ve been drinking, and then asks you to step out of the car to perform “a few tests.” Those tests (the Horizontal Gaze Nystagmus (HGN), […]

Highland Park DWI: What Makes These Cases Different

Highland Park DWI: What Makes These Cases Different

Highland Park, Texas, is a 2.2-square-mile enclave within Dallas that is home to approximately 9,000 residents — and one of the most aggressive DWI enforcement postures in North Texas. If you have been arrested for DWI in Highland Park, your case carries challenges and stakes that differ significantly from a DWI arrest anywhere else in […]