How to Challenge Breathalyzer and Field Sobriety Test Results

Lady Justice

Have you ever wondered how often breathalyzer and field sobriety tests actually get it wrong? According to some studies, breathalyzer machines can have a margin of error of up to 15%, and field sobriety tests fail to accurately determine impairment in about one-third of cases. When people are accused of driving under the influence, these tests are often the primary evidence used against them — but they are far from perfect.

That’s where we come in. At the Law Office of Robert M. Maurer II & Associates, we understand the serious consequences of DUI and DWI charges. With over 30 years of experience serving clients throughout South Texas, we know how to challenge flawed evidence and fight for our clients’ rights.

In this article, we’ll look at some of the most common ways to dispute breathalyzer and field sobriety test results.

Problems with Breathalyzer Tests

Breathalyzer devices are sensitive machines that depend on proper maintenance and administration. Several issues can affect their accuracy:

  1. Calibration errors: These devices require regular calibration. If not properly maintained, their results can be unreliable.
  2. Improper administration: The person operating the test must follow specific procedures. Any deviation can produce false readings.
  3. Medical conditions: Health issues like acid reflux or diabetes can lead to falsely elevated blood alcohol levels.
  4. Environmental factors: Substances such as mouthwash, breath fresheners, or even certain medications may skew results.

An experienced DUI lawyer knows how to examine the machine’s maintenance logs, the officer’s certification, and other technical details to question the validity of the breathalyzer results.

Weaknesses in Field Sobriety Tests

Field sobriety tests often involve physical coordination and balance, but many factors unrelated to alcohol consumption can affect performance:

  • Physical disabilities or injuries
  • Age or weight
  • Fatigue or anxiety
  • Uneven road surfaces or poor lighting

Even sober individuals can struggle with these tests under stressful conditions. A criminal defense lawyer will carefully analyze video footage, police reports, and medical history to challenge the officer’s interpretation of the test results.

Two lawyers in an office

Why a Strong Legal Defense Matters

Are you willing to let flawed tests determine your future? The consequences of DUI charges are severe, and you deserve someone who knows how to challenge the evidence. As one of the most experienced DWI attorneys in San Antonio, Robert M. Maurer brings three decades of courtroom experience, strong community ties, and 24-hour availability to every case. We know the system, the people, and the right strategies to protect your rights.

If you’re facing DUI charges, contact the Law Office of Robert M. Maurer II & Associates today. We’re ready to stand by your side.

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