How Blood Alcohol Content is Calculated

One of the most conclusive types of evidence thatA police officer normally administers the second test, a
can be heard against a defendant accused ofurine test, when the suspect arrives for booking. This is
DUI-driving under the influence of drugs/alcohol-is bloodthe least accurate of the testing methods because it is
alcohol content. Also known as BAC, blood alcoholimpossible to quantify how much alcohol is present in
content is determined in three different ways, normallythe body. Normally, urine testing is done when the
after the completion of the arrest process. All threeofficer suspects the person is driving under the
can be effectively used to prove the level of sobrietyinfluence of illegal or prescription drugs. With this type
a defendant displays, and can be entered as evidenceof testing, the results compared with the urine's
in court in almost every state in the United States.composition to determine the presence of drugs or
The first way that BAC is calculated is through aalcohol (normally via scientific evaluation).
breathalyzer test. The driver breathes a forcefulAn experienced DUI attorney will understand what
stream of air into a machine, which tests the amountarguments can be used effectively in this situation
of alcohol present. Most television shows and movieswhen presented with this evidence. No evidence is
glorify the breathalyzer test, but it is actually one of thealways viewed as concrete, as there can be unusual
least accurate indicator of blood alcohol content of thesituations present in each individual case that can skew
three. The highest number of television shows andthe information offered by the evidence toward the
movies that feature drunk driving from the officer'sprosecution.
perspective will portray him or her using a breathalyzerThe final test is a blood test. This testing is extremely
machine to test BAC.accurate, and considered the most reliable and
The arresting officer will inform the suspect that he oreffective form of testing. It is nearly impossible for
she has a duty to submit to a breathalyzer test. Amost attorneys to refute this type of evidence but an
failure to comply can result in the DMV (Department ofexperienced drunk driving attorney will be able to
Motor Vehicles) imposing more severe licenseexamine the evidence from all perspectives to search
suspensions than if you had cooperated and providedfor potential defenses. These can include medical
a breath sample. Drivers over the legal limit have theexplanations, faulty equipment, etc...
opportunity to plead remorse, or offer mitigatingMost judges view blood testing for BAC to be
circumstances, or even have the evidenceconcrete in the majority of cases. An experienced
suppressed, but drivers who did not test cannot argueattorney will understand how to present the evidence
on their own behalf as effectively. In addition, in mostin the most favorable light possible for you, depending
states when you refuse to submit to a breath test aon your unique circumstances, so seek help early to
more severe penalty will be imposed by the court.preserve your rights.
Usually this results in a longer license suspension time, aThis information is provided solely for informational
higher fine and/or additional jail time.purposes and does not constitute legal advice.