Knowledge Vault
DWI Defense
The science and law behind every DWI — blood and breath testing, the NHTSA field sobriety tests, and retrograde extrapolation. Written by attorneys who teach this material, including the first in Texas to pass the Forensic Sobriety Assessment Certification exam.
Articles
DWI Defense
Ask Deandra: What Is an Occupational (Essential Need) Driver’s License in Texas?
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Ask Deandra: How Do I Get My License Back After a DWI?
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Ask Deandra: What’s the Difference Between an Ignition Interlock and a SCRAM Device?
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Ask Deandra: How Does a DWI Impact My CDL?
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Ask Deandra: When Does a DWI Become a Felony in Texas?
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Ask Deandra: What Is a 3rd Offense DWI in Texas, and What Are the Penalties?
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Ask Deandra: What Is the Difference Between Intoxication Assault and Intoxication Manslaughter?
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Ask Deandra: What Is a Second Offense DWI in Texas and What Are the Penalties?
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Ask Deandra: What Is DWI with a Child Passenger and Why Is It a Felony?
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Ask Deandra: What Is “DWI 0.15” and Why Does the Higher BAC Matter?
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Ask Deandra: Can I Get a DWI in Texas if I’m Only on Prescription Medication?
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Ask Deandra: Can I Get a DWI for Marijuana or Edibles in Texas?
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Ask Deandra: What’s the Difference Between a DWI and a DUI in Texas?
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Ask Deandra: How Do Texas Police Prove a Drug DWI (DUID)?
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The Complete Guide to Court-Ordered Alcohol Monitoring Devices in Texas DWI Cases
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Ask Deandra: Can I Be Arrested for DWI in Texas if I’m Under 0.08?
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Ask Deandra: Should I Answer the Officer’s Questions After a DWI Arrest?
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Ask Deandra: Do I Have to Take a Field Sobriety Test in Texas?
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Ask Deandra: What Should I Do If I’m Pulled Over and the Officer Thinks I’m Drunk?
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Ask Deandra: Should I Fight My DWI in Texas?
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Ask Deandra: How Long Does a DWI Stay on My Record in Texas?
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Ask Deandra: What Happens at My First DWI Court Date?
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Ask Deandra: What Is an ALR Hearing and Do I Need One?
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Ask Deandra: What Is a First Offense DWI in Texas, and What Are the Penalties?
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Ask Deandra: Can I Get Deferred Adjudication for DWI?
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Ask Deandra: Can I Refuse a Breath Test in Texas?
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Ask Deandra: Can a DWI Blood Test Be Wrong?
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Ask Deandra: How Accurate Is the Breathalyzer in Texas?
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Ask Deandra: What Is a SCRAM Device?
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Can You Get Life in Prison for a DWI in Texas? The Peace Officer Enhancement Explained
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How Texas Uses Out-of-State DWI Convictions for Enhancement and How the Defense Challenges Them
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What to Do After a DWI Arrest in Texas: A Step-by-Step Guide
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The Rising Blood Alcohol Defense in Texas: Why the Number on the Test May Not Be the Number That Matters
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Can You Get a DWI While Parked?
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What Is Partition Ratio Variability — And Why a 0.08 Result May Not Mean What the Prosecution Claims
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Can Mouth Alcohol Contaminate a Breath Test in Texas?
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What Is In Vitro Fermentation — And Can It Produce a False BAC Result?
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The Intoxilyzer 9000: How Texas’s Breath Testing Instrument Works, What It Misses, and How to Challenge It
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The Tolerance Problem: Why a Blood Drug Concentration Does Not Equal Impairment
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Understanding the GC-FID: How the Instrument That Decides DWI Blood Test Cases Actually Works
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Retrograde Extrapolation: The Math Prosecutors Use to Guess Your BAC at the Time of Driving — And Why It’s Often Wrong
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A Horse Vet Blew a 0.087 on a Breathalyzer Without Drinking: Here’s What That Means for Your DWI Case
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Why Lab Accreditation Does Not Guarantee Your Test Results Are Correct
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Drug Recognition Experts: What They’re Trained to Do, What They Actually Can Do, and Where the Science Falls Short
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Roadside Cannabis Testing in 2026: The Science, the Devices, and What’s Actually Ready for the Courtroom
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The Standardized Field Sobriety Tests: A Critical History of the Science Behind the Roadside Exercises That Decide Your Freedom
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Auto-Brewery Syndrome: When Your Body Brews Its Own Alcohol
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How a DWI Affects Your Career in Texas: A Guide by Profession
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The DWI Defense Strategy Most Texas Attorneys Don’t Offer: Mitigation
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Can You Get a DWI on a Horse in Texas?
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Medical and Physiological Conditions That Can Produce a False Breath Test Result in Texas
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Bail in a Texas DWI Case: What You Need to Know
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“No Refusal Weekend” in Texas: What It Actually Is
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Can You Get a Texas DWI in a Self-Driving Car?
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Texas Implied Consent Law: What It Means, What It Requires, and Where It Can Be Challenged
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Can You Get a DWI on a Bicycle in Texas?
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Can You Own a Gun After a DWI Conviction in Texas?
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“Legal Blood” vs. “Hospital Blood”: Why the Type of Blood Test in Your DWI Case Matters
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