A breathalyzer reading is often treated as the centerpiece of a Florida DUI prosecution. In many Tampa cases, the state builds its entire case around a single number: the blood alcohol concentration reading produced by a breath testing device. But that number is not infallible. Breathalyzer results can be challenged on scientific, procedural, and constitutional grounds, and when a challenge succeeds, the foundation of the prosecution’s case can collapse entirely.
How Florida’s Breath Testing Program Works
Florida uses the Intoxilyzer 8000 as its primary breath testing instrument. The device works by measuring infrared light absorption in a breath sample to estimate the alcohol content in the blood. Results are reported as a BAC percentage, and a reading of 0.08 or above creates a per se violation of Florida’s DUI statute.
The reliability of that reading depends on several conditions being met: the instrument must be properly calibrated and maintained, the officer administering the test must be trained and certified, the testing procedure must follow established protocols, and the subject must not have conditions that interfere with the device’s measurements. When any of these conditions is not satisfied, the result is vulnerable to challenge.
Specific Grounds for Challenging Breathalyzer Results in Tampa
Attorney Ben Stechschulte of StechLaw Criminal Defense examines breathalyzer evidence from multiple angles in every Tampa DUI case. A Tampa DUI defense lawyer requests all calibration logs, maintenance records, and operator certifications as part of the initial case review. The most productive challenge grounds include:
- Calibration and maintenance records: Florida requires that breath testing devices be inspected and calibrated on a regular schedule. If the Intoxilyzer 8000 used in a case was not properly maintained or its calibration logs show compliance gaps, the accuracy of the result is directly called into question.
- Operator certification: The officer administering the breath test must hold a valid certification from the Florida Department of Law Enforcement. An expired or improperly obtained certification can render the test result inadmissible.
- Observation period violations: Florida requires a 20-minute observation period before the breath test during which the subject must not eat, drink, smoke, belch, or regurgitate. If the officer failed to properly observe this period, the test may be challenged.
- Physiological variables: Certain medical conditions, including gastroesophageal reflux disease, diabetes, and lung conditions, can cause mouth alcohol contamination or falsely elevated readings.
- Rising blood alcohol: If a person’s BAC was still rising at the time of the test, the reading may have been higher than it was at the time of driving, which is the legally relevant moment.
What Happens When a Breathalyzer Challenge Succeeds in a Tampa DUI Case
If the breath test result is suppressed or its reliability is successfully undermined, the state must rely on other evidence to prove impairment: field sobriety test performance, officer observations, and driving behavior. These forms of evidence are generally weaker than a numeric BAC reading, and cases without reliable chemical test evidence are substantially more difficult for the prosecution.
StechLaw Criminal Defense is a Tampa criminal defense firm. Attorney Ben Stechschulte handles DUI defense cases in the Tampa area, including cases where breathalyzer evidence is the primary basis for the prosecution’s case. Free consultations are available.
Evaluating the Breath Test Evidence in Your Tampa DUI Case
If you are facing a DUI charge in Tampa and a breathalyzer result is part of the prosecution’s case, speaking with a Tampa DUI defense lawyer about the specific testing circumstances is the most direct way to identify whether the result is challengeable and what that means for your case.
