Challenging The Breathalyzer (now called Intoxilyzer)
San Antonio and South Texas DWI Attorneys - Our driving
while intoxicated Defense Lawyer Challenging the Reliability of Breath Alcohol Test
In a San Antonio and South Texas DWI cases, the prosecution
will try to prove that the defendant's blood alcohol concentration at the time of
the offense was at or above the statutory limit. In Texas that limit is .08 . The
most common scientific instrument used to measure a person’s BAC is a breath
test using an Intoxilyzer, frequently called a “breathalyzer,” an older
instrument not frequently used now.
Is a breath test an absolutely reliable scientific method
to prove that someone is over the legal limit? The simple answer is NO. Drunk driving
attorneys have been able to effectively dispute the outcome of breath tests in court,
thereby preventing a conviction. An experienced San Antonio drunk driving defense
lawyer is in the best position to advise you on whether the "Breathalyzer" test
results may be subject to challenge in your particular case.
Breath Test Results Can Be Challenged In Many
A breath test is quite simple to perform and involves
measuring the amount of alcohol in a certain amount of expired air. The drawback
to the breath test is that it is an “indirect” method and therefore
subject to variability. Variables that can lead to questionable results include:
- body temperature at the time
of the test,
- differences between normal
- sufficient observation of the
arrested person to assure evaporation of any alcohol in the mouth,
- skill and experience of the
- maintenance or quality of equipment
- exposure of the accused to
paint or gasoline fumes or dry cleaning fluids
Some courts have allowed drunk driving defendants to
present expert testimony of the scientific inaccuracy of breath test results based
on these inherent variables.
Some courts have demonstrated more willingness than others
to accept challenges to blood alcohol test results. An experienced San Antonio drunk
driving attorney will know which challenges are likely to be accepted in local courts
and which are not. That is why you should choose your defense lawyer very carefully.
It is important to remember that even if you have blown an above-the-limit reading
you may not be convicted of DWI . If you have been charged with driving while intoxicated
in San Antonio or the surrounding counties, contact us for and schedule a fee consultation.
Bring the facts or your case to use and put our knowledge to work defending your
rights and protecting your freedom.
Located in San Antonio, Texas we represent clients charged
with drunk driving offenses in communities throughout the surrounding area.
Protect your rights and your freedom. Contact our office
as soon as possible and let us start to aggressively fight for you today The Law
Offices of Carabin & Shaw .