Are DUI Breathalyzer Tests Always Accurate?

No. Prosecutors rely heavily on breathalyzer results to secure DUI convictions in Kansas. However, these devices produce inaccurate readings far more often than most people realize. Law enforcement presents breath test results as irrefutable scientific evidence, but several factors can cause these machines to generate falsely elevated blood alcohol concentration readings.

A failed breathalyzer test does not automatically mean a conviction is warranted. Breath test evidence must be carefully examined, and errors or flaws in the testing process can lead to wrongful DUI charges against drivers who are not legally intoxicated.

Common Causes of Inaccurate Readings

Multiple factors can cause breathalyzer devices to produce readings that do not reflect your actual level of impairment. Every potential source of error must be investigated when building a DUI defense, including:

• Residual Mouth Alcohol: Recent use of mouthwash, breath fresheners, or certain medications can leave alcohol in your mouth, which can inflate test results.
• Medical Conditions: Diabetes, acid reflux, and other health issues can produce acetone or other compounds that breathalyzers misidentify as alcohol.
• Device Malfunction: Faulty sensors, software errors, and electrical interference can generate completely unreliable readings.

Calibration and Maintenance Requirements

Kansas law mandates that law enforcement calibrate and maintain breathalyzers in accordance with strict protocols. Under K.S.A. 8-1002, the Kansas Department of Health and Environment sets the standards for testing equipment and procedures.

If these requirements are not followed, the test results can be called into question. Calibration records, maintenance logs, and certification documents should be reviewed to determine whether the device used in a case complied with all legal standards.

Officer Error During Testing

When operators fail to follow correct testing procedures, properly functioning equipment can yield inaccurate results. Officer conduct must be examined for violations that compromise test validity:

• Officers must observe you continuously for at least 15 minutes before administering the test to ensure you do not burp, vomit, or put anything in your mouth.
• Failure to provide clear instructions or allow adequate breath samples can skew results.
• Missing or incomplete paperwork regarding test administration raises questions about whether officers followed proper protocols.

Building Your Defense Strategy

Every DUI case should be approached by thoroughly examining the breath test evidence. Weaknesses in the prosecution’s case may be identified through:

• Expert Witness Testimony: Using forensic toxicologists who can explain breathalyzer limitations to judges and juries.
• Discovery Requests: Demanding all records related to the device, the officer’s training, and the testing procedures used in your case.
• Motion Practice: Filing motions to suppress unreliable breath test evidence when legal grounds exist.

Facing DUI Charges? Contact Us Today

A DUI conviction in Kansas can carry serious, long-term consequences, including license suspension, steep fines, increased insurance costs, and possible jail time. Prosecutors often lean heavily on breathalyzer results, even when those results are flawed, incomplete, or taken out of context. A breath test number alone does not tell the full story of what happened.

Protecting your record and your driving privileges requires legal counsel who knows how to challenge breath test evidence and hold the prosecution to its burden of proof. Contact Henderson Legal Defense at (913) 359-3789 to schedule a free consultation and speak with a DUI attorney prepared to aggressively challenge the evidence against you.