Breath test results often play a central role in DUI cases, and many people assume those results are final and unquestionable. In reality, there are several factors that can affect the accuracy of a breath test. If you are facing charges, a DUI defense attorney will take a closer look at how the test was conducted and whether the result can be relied on.

Your lawyer’s goal is to examine the details behind the number, not just the number itself. By understanding how the test works and where problems can occur, it becomes possible to question whether the result truly reflects what happened.

Looking At How The Test Was Administered

One of the first things your lawyer will review is how the breath test was given. Officers are required to follow specific procedures, and even small deviations can raise concerns. Timing, instructions, and observation periods all matter when it comes to proper administration.

If the officer did not follow the correct steps, that can affect the reliability of the result. Your attorney will look for gaps in the process and compare what actually happened with what should have happened under proper guidelines.

Checking Equipment Maintenance & Calibration

Breath testing devices must be regularly maintained and calibrated to produce accurate readings. If the machine has not been serviced properly or if records are incomplete, that can create doubt about the result. Your lawyer may request maintenance logs and calibration records to see whether the device was functioning as expected.

Issues with the equipment do not always appear on the surface. A closer review can reveal whether the machine was overdue for maintenance or if there were prior problems that could affect accuracy.

Examining External Factors That Affect Results

Breath test results can also be influenced by factors unrelated to actual impairment. Medical conditions, certain medications, or even residual alcohol in the mouth can lead to readings that are higher than expected. Environmental factors, such as temperature or nearby substances, may also play a role.

Your lawyer will consider whether any of these factors could have affected the test in your case. Raising these points can help show that the result may not fully reflect your condition at the time.

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Comparing Results With Other Evidence

A breath test is only one part of the overall case. Your attorney will compare the result with other evidence, such as officer observations, video footage, and your behavior during the stop. If the test result does not align with the rest of the evidence, that inconsistency can be important. Looking at the full picture allows your lawyer to build a more balanced argument. Instead of relying on a single number, they focus on whether the evidence as a whole supports the charge.

Challenging breath test accuracy is not about dismissing the test outright. It is about making sure the result is fair, reliable, and supported by proper procedures. With careful review and attention to detail, your DUI defense attorney can identify issues that may strengthen your defense and protect your rights.