What is a valid reason for a breath test's results to be deemed inadmissible in court?

The results of a breath test may be deemed inadmissible in court if proper operational protocols were not followed. This is because the reliability and accuracy of the test results depend heavily on strict adherence to established standards and procedures. The Intoxilyzer 9000, like any breath-testing device, must be operated correctly to ensure that the results are scientifically valid.

Failure to follow these operational protocols can lead to issues with calibration, maintenance, or even the way the test is administered, which may compromise the integrity of the testing process. Courts require that evidence presented, particularly in DUI cases, upholds certain standards to ensure that results can be trusted. As a result, if any deviation from proper protocol occurs, it can provide grounds for challenging the validity of the test results in a legal setting.

In contrast, factors such as the subject's medical history or the test location (whether indoors or outdoors) do not automatically negate the admissibility of test results. Additionally, informing a subject of their rights, while important in legal proceedings, is not directly tied to the technical validity of the breath test results themselves. The crux lies in the operational integrity of the breath testing process, making adherence to protocols paramount for admissibility in court.