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How is blood-alcohol concentration determined?

When you are stopped for the suspicion of drunk driving, one thing that will happen is that the law enforcement officers will need to determine your blood-alcohol concentration. There are several ways to do this, but the most commonly used is the breath test. If you have been pulled over and had a BAC test performed, you should understand some basic points.

How accurate are BAC tests?

The accuracy of BAC tests depends on several factors. One of these factors is the type of test that is done. Generally, blood tests are more accurate than breath tests. Law enforcement officials tend to rely more on the breath tests because they aren't as invasive as the blood tests. Still, breath test results can vary by as much as 15 percent.

What are all the options for learning BAC?

The two most common methods are the breath test and the blood test. BAC can also be determined through urine, hair follicles, and saliva. There are some instances in which law enforcement officials might rely on a test other than the breath test. One example would be if there was a serious accident or if the driver wouldn't do the breath test.

If you have been arrested for drunk driving, the BAC is a huge component of your case. Make sure that you pay attention to the method they use to determine your BAC. If the testing wasn't handled according to the required standards, there is a possibility that you could use that information as part of your defense strategy against the charges.

Source: FindLaw, "BAC Test FAQs," accessed Dec. 24, 2015

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