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Breath and Blood Tests

San Diego, CA DUI Defense Attorneys – DUI Crew

San Diego DUI Defense Attorney

Breath & Blood Tests

If you have been arrested for DUI after failing or refusing a breath or blood test an experienced San Diego DUI lawyer at DUI Crew is here to assist you and fight your case.

In order to convict someone of DUI (driving under the influence) in San Diego, law enforcement and the prosecuting attorney will use a driver’s breath or blood test results as evidence. A breath test, blood test or sometimes even a urine test can be used to conclude a driver’s blood alcohol concentration (BAC). If the driver is operating a vehicle while their blood alcohol concentration is at .08% or higher, they can be charged with a DUI. Underage drivers can have their license suspended with a BAC of anything over .01%, and commercial drivers can face criminal charges when having a BAC of .04% or higher.

About Breath Tests and Blood Tests

A breath test is typically done by having the driver blow into a breathalyzer which determines the concentration of alcohol in their blood from the breath sample. Breath tests are usually considered less reliable than a blood test and may have several issues arise that can affect the results. A San Diego DUI attorney can bring these up to challenge your breath test results in court. For example, the breathalyzer machine needs to be calibrated often and according to state standards in order for the results to be used in court. If the breathalyzer device was not calibrated, your San Diego DUI defense lawyer may be able to use this to help fight your case.

A blood test is done by taking a sample of blood from the suspect and then processing this to determine the driver’s blood alcohol concentration (BAC). Even though blood tests are more accurate than breath tests, blood tests have their own faults as well and may be handled improperly, administered by an untrained professional or mishandled some other way. Your attorney may be able to use this to help you fight your case.

Learn more about blood and breath tests, DUI and what we can do to help you by contacting an attorney at San Diego DUI Crew today.


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