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Can a PAS Test Be Used Against You? Understanding Breath Tests in DUI Cases and DMV Hearings

May 11, 2025

As a Criminal Defense DUI Attorney in Los Angeles, I often get questions about the breath test police ask you to take during a DUI stop—before any arrest is made. This initial test, known as the Preliminary Alcohol Screening (PAS) test, is a key part of the investigation, but it’s not the official chemical test required after arrest. Understanding the distinction between these tests, and how the courts and DMV treat PAS results, can be crucial to defending your rights. Los Angeles DUI Attorney and Los Angeles Criminal Defense Attorney Alex Andryuschenko can help you defend your Los Angeles DUI case. The PAS Test: Voluntary and Refusable—At Least in Court Under California Vehicle Code § 23612(i), if you are over […]

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Science For DUI Cases

February 5, 2012

A DUI lawyer in Los Angeles can use science to attack the reliability of breath results. Some Los Angeles DUI lawyers have background in science, others learned enough from books and experts. The prosecutor, as part of his case, will use an expert to interpret the blood results and opine on the impairment. Defense can either attack the testimony of the People’s expert or/and can call its own expert who will opine that there is no impairment and/or that the alcohol level at the time of driving is below the statutory .08%. Short of calling your own expert, Los Angeles DWI lawyers need to know basic scientific articles discussing science behind alcohol impairment and level of alcohol in blood. Because […]

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