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 is “consent” not “CONSENT”?

When is “consent” not “CONSENT”

What do you do when the Police say you consented to something, but you do not remember doing so or expressly remember not giving consent? How does someone fight what the police are calling “consent” in a criminal case? This situation happened recently with one of our firm’s clients. “Jake” was arrested by the Harris County […]

Attorney Grant Believes It Is Time for DA Susan Hawk to Step Down

Deandra Grant

Dallas District Attorney, Susan Hawk, has been in and out of psychiatric hospitals in the last year, preventing her from doing her job well, according to Attorney Deandra Grant. While once an avid supporter of Susan Hawk, Grant now believes that it is time for Hawk to take some time away from the job to take […]

“Legal Blood” vs. “Hospital Blood”: Why the Type of Blood Test in Your DWI Case Matters

“Legal Blood” vs. “Hospital Blood”: Why the Type of Blood Test in Your DWI Case Matters

Drawing blood as part of a DWI arrest (either by consent of the arrestee or by court order in the form of a search warrant) has increased exponentially in Texas since 2008. It is now a rare circumstance for a DWI case in North Texas not to have a breath or blood alcohol test result. […]

Due To Staff Reduction, DWI Arrests By DPD Significantly Decline

Due To Staff Reduction, DWI Arrests By DPD Significantly Decline

The Dallas Police Department’s DWI squad historically consisted of 10 or more officers who made the bulk of the city’s DWI arrests. Under our current police chief, however, that number has decreased in size to only one officer, resulting in a 50% drop in DWI arrests for the entire department – from 3,491 in 2009 […]

After Your DWI Arrest – Tip #1

After Your DWI Arrest - Tip #1

Make sure the address on your driver’s license is correct and check your mail regularly for letters from DPS. The Department of Public Safety mails letters to the address they have on file. If you have moved or don’t frequently check your mail, you may miss time-sensitive letters regarding your right to challenge the suspension […]

The American Chemical Society’s Forensic Lawyer-Scientist exam

The American Chemical Society's Forensic Lawyer-Scientist exam

After 4 years of study and coursework, I passed the ACS Forensic Lawyer-Scientist exam this week in Chicago.  It’s been a long but rewarding road.  I want to thank the whole staff at Axion Labs for the amazing education and support.  Thank you Dr. Lee Polite, Dr. Harold McNair, Lew, Mary Beth, Justin McShane, Josh […]

Attorney Buehner Represents man jailed for 200 days without being convicted

Deandra Grant

It seems a client of Attorney Laura Buehner had been incarcerated in a Dallas jail for seven months for misdemeanor criminal trespass without having been convicted of it. The man was apparently lost in the Dallas County criminal justice system. The county District Attorney’s Office claimed a clerk did not follow through with procedure. Buehner, […]

Integrated Forensic Laboratories: Who’s on First?

Who's on first

Dealing with Integrated Forensic Laboratories (IFL) and the Tarrant County District Attorney’s Office recently regarding lab reports bearing the name of former IFL lab tech Elizabeth Feller has turned into an Abbott and Costello skit. IFL has quite the knack for hiring laboratory personnel with questionable work histories.One only needs to Google the term “Cherie […]