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7 Houston Defense Lawyers Who Excel at Challenging BAC Test Results

Blood Alcohol Concentration (BAC) test results often serve as the cornerstone of a prosecutor’s DWI case, but they are not infallible. From improper calibration of breathalyzers to mishandling of blood samples, errors can occur at multiple points in the testing process. An experienced defense lawyer knows how to scrutinize every detail of the evidence, challenge questionable procedures, and present persuasive arguments to undermine the prosecution’s reliance on flawed BAC results.

In Houston, some defense attorneys have developed a strong reputation for their skill in attacking BAC evidence, combining technical knowledge with strategic courtroom advocacy. These lawyers understand the science behind the tests, the legal requirements for admissibility, and how to expose weaknesses that can lead to reduced charges or even full dismissals. Below are seven Houston defense lawyers recognized for their ability to successfully challenge BAC results.

1. The Law Office of David A. Breston


The Law Office of David A. Breston is widely respected for its methodical and aggressive approach to contesting BAC evidence in DWI cases. David Breston understands that even a seemingly straightforward BAC reading can be compromised by a range of factors, from faulty equipment to operator error. He digs deep into the details—examining maintenance logs for breath testing devices, questioning whether officers followed proper testing protocols, and consulting with forensic experts to identify inconsistencies.


This meticulous review often uncovers evidence that can weaken or completely discredit the state’s case. Clients can learn more about the firm’s approach and track record by visiting https://www.houston-criminalattorney.com/houston-dwi-lawyer/, where they’ll find details about its defense strategies and commitment to protecting client rights. Breston’s ability to combine technical challenges with persuasive legal arguments has helped many clients achieve favorable outcomes, including reduced charges or outright case dismissals.

2. Douglas W. Atkinson, Attorney at Law

Douglas W. Atkinson brings more than two decades of experience to defending clients against DWI charges, with a particular focus on challenging BAC test results. He understands that breathalyzers and blood tests are only as reliable as the procedures and equipment used. Atkinson routinely investigates whether testing machines were properly calibrated, whether operators were adequately trained, and whether chain-of-custody procedures were strictly followed.

His defense strategies often incorporate expert testimony to explain the potential for false positives or inaccurate readings to a jury. By combining technical knowledge with skilled cross-examination, Atkinson has secured numerous victories for clients accused of driving while intoxicated.

3. Neal Davis Law Firm

Neal Davis Law Firm has earned a strong reputation for exposing weaknesses in BAC evidence. Neal Davis himself has an in-depth understanding of the science behind chemical testing and the legal standards governing its use in court. He frequently challenges the admissibility of BAC results by highlighting procedural errors, contamination risks, or medical conditions that could skew results.

The firm’s approach is thorough and data-driven, often enlisting forensic toxicologists to break down the prosecution’s evidence. Davis’s ability to explain complex technical issues in a way that judges and juries can understand gives his clients a distinct advantage in the courtroom.

4. The Martinez Law Firm

The Martinez Law Firm, led by Herman Martinez, is known for aggressive defense strategies that focus on dismantling the prosecution’s reliance on BAC results. Martinez investigates every stage of the testing process, from the initial traffic stop to the storage and analysis of samples. Any deviation from strict protocol can become the foundation for a successful defense.

His experience as a former prosecutor gives him insight into how the state builds its cases, allowing him to anticipate and counter their arguments effectively. Martinez’s commitment to protecting his clients’ rights has helped many individuals avoid the harsh consequences of a DWI conviction.

5. Matt Horak Law

Matt Horak Law excels at challenging the reliability of BAC evidence in DWI cases. As a former prosecutor, Matt Horak understands both sides of the legal battle, enabling him to identify and exploit weaknesses in the state’s testing procedures. He examines calibration records, operator certifications, and environmental factors that could have affected the test results.

Horak’s ability to combine scientific scrutiny with aggressive advocacy makes him a formidable opponent in court. His goal is always to ensure that unreliable or improperly obtained evidence does not lead to an unjust conviction.

6. Butler & Harris

Butler & Harris bring years of trial experience and a deep understanding of BAC testing technology to their DWI defense practice. Their attorneys are skilled at identifying irregularities in the testing process, from unclean mouthpieces in breathalyzers to improper refrigeration of blood samples.

They often work with forensic experts to cast doubt on the reliability of the prosecution’s evidence. By presenting clear and credible challenges to BAC results, Butler & Harris have helped many clients achieve reduced charges or complete acquittals.

7. The Gonzalez Law Group, PLLC

The Gonzalez Law Group, PLLC, offers comprehensive DWI defense with a strong focus on challenging chemical test results. Their attorneys scrutinize every aspect of the evidence, from the legality of the initial stop to the proper handling of samples. Any procedural misstep can become grounds for excluding BAC results from trial.

Clients appreciate the firm’s thorough preparation and willingness to go the extra mile in building a strong defense. Their combination of legal skill and scientific understanding makes them a strong choice for anyone seeking to contest BAC evidence in Houston.

Breaking Down the State’s Strongest Evidence


BAC results are often regarded as the most persuasive evidence for the prosecution in a DWI case. However, with a solid defense strategy, these results can be effectively challenged or even excluded. The Houston lawyers highlighted here possess the expertise, resources, and determination to scrutinize every aspect of BAC testing, including the scientific principles and procedures involved.


Taking prompt action and selecting an attorney experienced in handling these challenges allows defendants to balance the scales and improve their chances of avoiding the harsh penalties associated with a DWI conviction. In capable hands, even the prosecution's "strongest" evidence can become a source of doubt.

author

Chris Bates


Monday, September 01, 2025
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