What is a common misconception about breath alcohol testing?

The statement that breath tests cannot yield false readings illustrates a significant misconception about breath alcohol testing. In reality, while breath tests, such as those conducted with the Intoxilyzer 9000, are designed to provide accurate and reliable measurements of blood alcohol concentration (BAC), they are not infallible and can produce false readings under certain conditions.

Factors such as calibration issues, the presence of other substances in the breath, environmental influences, and even the individual's physiological conditions can impact the accuracy of the readings. For instance, mouth alcohol from recent consumption, certain medical conditions, or improper handling of the testing device can lead to inaccuracies.

Understanding that breath tests can yield false readings is crucial for both law enforcement officers and individuals subject to these tests, as it underscores the importance of following proper testing protocols and confirming results with additional methods when necessary. This knowledge helps promote a more informed discussion about the limitations and reliability of breath alcohol testing.