Underage DWI - David Smith Law Firm, PLLC

Houston Underage DWI Defense Lawyer

Houston Underage DWI Attorney. Protecting a Young Person's Record and Future Under Texas Zero-Tolerance Law.

Texas enforces a zero-tolerance alcohol policy for drivers under 21. Under the Texas Traffic Code, any detectable alcohol at or above a BAC of 0.02% can support a DUI charge for a minor. If the minor’s BAC reaches 0.08% or above, the case may be prosecuted as a standard DWI under the Penal Code rather than the Traffic Code, carrying criminal penalties rather than just license consequences. A conviction at either level can affect college applications, scholarship eligibility, and professional licensing for years. From arrest, the 15-day ALR window begins. Miss it and the license is automatically suspended.

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David Smith is Board Certified in Criminal Law by the Texas Board of Legal Specialization and a former Brazoria County prosecutor. Underage DWI cases require a defense that understands both the juvenile court system and the adult criminal court system, because depending on the facts, age, and BAC level, the case may be handled in either one. He also understands the long-term record consequences that matter most to a young person and their family, and he build a defense strategy around protecting the future, not just resolving the current charge. Contact our firm today for a free consultation.

  • Board Certified in Criminal Law by the Texas Board of Legal Specialization, with expertise across both the juvenile and adult criminal systems that underage DWI cases can involve
  • Former Brazoria County prosecution experience in minor in possession and underage DWI cases, giving us firsthand knowledge of how these charges are built and where the evidence is weakest
  • Forensic Chromatography training through Axion Labs, part of the ACS-CHAL Lawyer Scientist pathway. At a 0.02% threshold, the reliability of the testing instrument matters more, not less

Why an Underage DWI Requires Its Own Defense Strategy?

The zero-tolerance standard changes the legal landscape entirely. At 0.02%, a margin of error in the breath testing instrument or a slight variance in the timing of the test relative to alcohol consumption can be the difference between a charge and no charge. The stakes are also different from an adult case. A conviction or even a deferred adjudication can show up on background checks that affect college admissions, financial aid, military enlistment, and professional licensing. Board Certification in Criminal Law by the Texas Board of Legal Specialization is a credential that reflects expertise across the full range of consequences these cases carry.

Our defense in underage DWI cases addresses the charge itself, the record consequences, and the long-term options for record relief. We focus on:

  • Contesting the reliability of the breath test at the 0.02% threshold. At such a low level, calibration errors, mouth alcohol contamination, and timing of the test relative to consumption all become more significant, not less
  • Challenging the legality of the traffic stop. The constitutional requirement of reasonable suspicion applies equally to stops involving minor drivers, and an unlawful stop can result in suppression of all evidence obtained from it
  • Evaluating whether the case should be handled in juvenile court or adult court and advocating for the track that best protects the young person’s long-term record
  • Assessing deferred adjudication eligibility. A deferred outcome in an underage DWI case can preserve the young person’s ability to pursue expunction or nondisclosure later, which matters significantly for employment and licensing
  • Identifying record relief options available after resolution. Depending on the outcome, expunction or nondisclosure may be available to limit the long-term public impact of the charge on the young person’s future

Ignition Interlock Devices in Texas: What DWI Clients Need to Know

As part of a DWI sentence or plea agreement in Texas, courts frequently order the installation of an Ignition Interlock Device (IID) , a breath-testing instrument connected to your vehicle’s ignition that requires a clean breath sample before the engine will start. For clients in the Greater Houston area, David Smith Law Firm has arranged access to SmartStart IID services, including a free first month for qualifying clients.

Choosing a reliable IID provider matters. Non-compliance with IID requirements including missed calibration appointments or tampered devices can result in additional criminal penalties or probation violations. SmartStart provides 24/7 support and is available across Houston and Harris County.

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When your freedom is at risk, You need criminal expertise on your side.

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