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

Ask Deandra: How Do Police Prove a Drug-Based DWI Without a Blood Test?

The question: How do police prove a drug-based DWI without a blood test? The short answer: They do it through observation, blood testing, and a (theoretically) specially trained officer called a Drug Recognition Evaluator. The Intoxilyzer 9000 (the standard breath instrument used in Texas DWI cases) measures alcohol only. It does not detect cannabis, prescription […]

The Judge Who Steered Half a Million Dollars to Her Childhood Friend

A sixteen-year domestic relations judge from the Cleveland Celebrezze political dynasty bypassed Ohio’s random case assignment rules to hand-pick lucrative divorce work for the family friend she told colleagues she was in love with. The Ohio Supreme Court suspended her from the practice of law. The county prosecutor put her in jail.   THE QUICK […]

Can Police Get Into Your iPhone? How Apple’s New Security Is Reshaping Digital Evidence

By Douglas E. Huff  |  Partner, Deandra Grant Law  |  Dallas, Texas In March 2026, Apple released iOS 26.4. Buried in the release was a change that has (quietly) reshaped the landscape of mobile-device forensics. A feature called Stolen Device Protection, or SDP, which Apple introduced in iOS 17.3 in early 2024 as an opt-in […]

The Michael Morton Act, the Richard Miles Act and the Heath Opinion Now Under Fire

Most people who are not lawyers do not think much about criminal discovery. It sounds like procedure which is the dry, technical part of how a case moves through the system. But discovery is the work of getting the truth into the courtroom, and the rules that govern what each side is required to turn […]

The Complete Guide to Court-Ordered Alcohol Monitoring Devices in Texas DWI Cases

SCRAM, Ignition Interlock, Soberlink, and the New Wave of Wearables — What They Are, Who Makes Them, and Where the Science Breaks Down By Deandra Grant, J.D., M.S. (Pharmaceutical Science), ACS-CHAL Forensic Lawyer-Scientist   If you have a DWI case in Texas, there is a good chance a monitoring device will become part of it […]

New Study: Recreational Cannabis Users Test Like Non-Users

A study published earlier this year in the peer-reviewed journal Comprehensive Psychiatry took a careful look at a question that often goes muddled in the courtroom: does using cannabis make you cognitively impaired in some lasting, measurable way or does that depend entirely on how a person uses it? The answer the researchers reached, simplified: […]

Pitchford v. Cain: What a Batson Challenge Is, and Why the Jury Is Often Decided Before the First Witness

By Deandra Grant  |  Deandra Grant Law  |  Dallas, Texas On May 28, 2026, the United States Supreme Court reversed the conviction and death sentence of Terry Pitchford, a Black man on Mississippi’s death row, ruling 5-4 that the state trial court never properly evaluated his claim that prosecutors had unconstitutionally struck black jurors at […]