Difference Between the PAS Test and the Chemical Breath Test
Campbell Whitten: Your Hometown Bakersfield DUI Lawyer
The PAS Test is a normal part of every police officer’s field sobriety
tool kit. With a PAS Test, an officer can get a general idea of an individual’s
specific BAC reading at the time of a traffic stop or other interaction
with law enforcement. Despite the usefulness of the PAS Test in allowing
an officer to have an idea of how intoxicated a person is, because the
test results can vary by as much as 15% from an individual’s actual
BAC, the results of this test are not admissible in a court of law. In
many states, PAS Tests have been found to measure BAC unreliably and inaccurately.
In most of these situations, individual’s PAS Test results show
a BAC reading that is higher than the individual’s actual BAC according
to other more reliable testing methods.
Chemical Testing is a far more reliable means of attaining an accurate
BAC reading because of the controlled environment of the police station
relative to that of the roadside field sobriety test. Chemical Testing
typically entails breath analysis, a blood test and or a urinalysis screening.
Each of these methods is more accurate and reliable then a roadside PAS
Test. Despite this, even the results of Chemical Testing for BAC can be
compromised. Irregular breathing patterns, blood and vomit have been known
to impact stationary breath analysis testing as typically carried out
in police departments.
The Blood Test is often considered the most accurate of the Chemical Testing
methods, though it is not commonly utilized unless an officer feels a
breath test may have been compromised or inaccurate in some specific way.
Blood Tests are also more expensive to process then Breath Analysis or
Urinalysis BAC screenings. More common than Blood Tests, Urinalysis BAC
Screenings are considered reliable though their results must be verified
in a laboratory setting. Because of the extra time it can take to process
these Chemical Tests, many jurisdictions do not rely on them.
Regardless of if you have been asked to take a PAS or Chemical Test, it
is important to know that your choice to submit breath, blood or urine
samples is always voluntary. No officer can coerce or otherwise force
you to submit to any form of BAC screening. Refusal to take a test to
measure BAC could still result in a lawful conviction for DUI depending
on the circumstances of your specific case.
Avoid Bakersfield DUI Charges, Get The Right Lawyer
If you have any questions about how a PAS or Chemical Test was administered
to you, call Campbell Whitten today!