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What is preliminary alcohol screening?

On Behalf of | Dec 15, 2023 | Firm News

When facing a drunk driving charge, one of the critical elements often encountered is the preliminary alcohol screening. It is crucial to understand what this entails and its implications in a drunk driving case.

Preliminary alcohol screening is a procedure typically conducted at the scene of a traffic stop where a driver is suspected of driving under the influence. It involves using a handheld device to measure a driver’s blood alcohol concentration. 

How does a PAS work?

PAS is a field sobriety test used by law enforcement to assess a driver’s level of impairment. The device measures the alcohol content in a breath sample, providing an immediate estimate of the driver’s BAC. Although it’s a standard tool in DUI investigations, its use and the results might be scrutinized.

How accurate are they?

The accuracy of PAS devices can be influenced by various factors, including the device’s calibration, its use and external factors like the driver’s medical conditions or diet. Challenges to the reliability of PAS results are expected in DUI cases.

How does PAS impact DUI?

PAS results often play a vital role in the decision to arrest a driver for DUI and can influence the direction of the subsequent legal process. However, these results aren’t suitable for charges to be levied. Instead, people who don’t pass the PAS are taken for more reliable chemical testing, such as a blood test, urinalysis or a stationary breath test machine.

Facing a DUI charge is a serious matter, and the complexities surrounding PAS tests add another layer to consider. Seeking guidance from those familiar with these matters can provide valuable insights into the case and help formulate an effective defense strategy.

Ramos & Del Cueto, can provide experienced and dedicated assistance if you find yourself in need of help. Call 210-761-6004 or use the form below to contact our firm immediately.