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

Online Solicitation of a Minor in Texas: What §33.021 Actually Covers and How These Cases Are Defended

Online Solicitation of a Minor in Texas What §33.021 Actually Covers and How These Cases Are Defended

Online solicitation of a minor is one of the most aggressively prosecuted sex offenses in Texas, and one of the most frequently charged as a result of law enforcement sting operations. If you have been arrested under Texas Penal Code §33.021, you may be facing a felony with mandatory sex offender registration and the circumstances […]

What Is a Forensic Laboratory Audit & What Does It Reveal

What Is a Forensic Laboratory Audit & What Does It Reveal

Forensic laboratories that serve the criminal justice system are required to maintain accreditation through bodies such as ANAB (ANSI National Accreditation Board) or A2LA (American Association for Laboratory Accreditation). Accreditation requires compliance with established quality standards and periodic external audits that assess whether the laboratory is meeting those standards. When problems are found, accreditation can […]

The Difference Between Screening Tests and Confirmatory Tests in Drug Cases

The Difference Between Screening Tests and Confirmatory Tests in Drug Cases

In any Texas drug case (whether arising from a probation drug test, a workplace test, or a drug possession arrest) understanding the difference between a screening test and a confirmatory test is foundational. These are not two names for the same thing. They are two different analytical processes with different purposes, different reliability characteristics, different […]

How Child Sexual Assault Cases Are Investigated in Texas And Where the Process Can Go Wrong

How Child Sexual Assault Cases Are Investigated in Texas And Where the Process Can Go Wrong

If you have been accused of sexually assaulting a child in Texas, you are likely experiencing a level of fear and confusion that is difficult to put into words. The allegation alone can result in immediate separation from your family, loss of employment, and public scrutiny. And the investigation that follows will determine whether you […]

Indicted for Murder in Texas? How the Grand Jury Process Works and What a Defense Packet Can Do

Indicted for Murder in Texas How the Grand Jury Process Works and What a Defense Packet Can Do

When you are under investigation for murder in Texas, the grand jury proceeding is often one of the first critical battleground and it is one that most people facing charges do not understand until it is too late to use it effectively. A grand jury decides whether the prosecution has probable cause to formally charge […]

PPP and EIDL Fraud Prosecutions in 2026: Where These Cases Stand in Texas

PPP and EIDL Fraud Prosecutions in 2026 Where These Cases Stand in Texas

The Paycheck Protection Program and Economic Injury Disaster Loan program distributed more than a trillion dollars in pandemic relief funding between 2020 and 2022. Federal prosecutors have been working through the resulting fraud cases ever since, and in 2026 those prosecutions are far from finished. A coordinated federal enforcement sweep in early 2026 charged approximately […]

Caught with a Gun in Your Carry-On at DFW? It’s a Federal Case.

By Deandra Grant Deandra Grant Law Dallas, Texas

DFW International Airport intercepted 378 firearms at its security checkpoints in 2024 which is the second highest total of any airport in the United States (behind only Atlanta’s Hartsfield-Jackson). Texas is the number one state in the country for airport gun seizures. Of the firearms detected at DFW, the overwhelming majority were loaded. Almost none […]

Civil Demand Letters After a Shoplifting Arrest in Texas: What They Are and What to Do

Civil Demand Letters After a Shoplifting Arrest in Texas What They Are and What to Do

A few weeks after a shoplifting arrest in Texas, many people receive a certified letter at home from a law firm they have never heard of. The letter demands payment of several hundred dollars (sometimes significantly more than the value of whatever was allegedly taken) and threatens legal action if the amount is not paid […]

I-35 and the Drug Stop Playbook: What Law Enforcement Is Doing and How These Cases Are Defended

I-35 and the Drug Stop Playbook What Law Enforcement Is Doing and How These Cases Are Defended

you were stopped on I-35 in North or Central Texas and found yourself facing drug charges, you were not the victim of random bad luck. You were the target of a structured enforcement operation that has been running on this highway for decades. Understanding how that operation works is the starting point for understanding how […]