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DUI Blood Tests & DNA

Say you were arrested for driving under the influence (DUI) and you strongly believe that the blood sample came back with too high of a blood alcohol concentration (BAC). Now, you want to see if you can have a DNA test of the blood sample to make sure it was yours.

You want to know, “Could my blood sample have been switched at the lab?” You never heard of this defense before, but you know there are labs that do paternity and immigration DNA testing. Maybe you even went so far as to purchase a breathalyzer and ran your own tests, which involved drinking the same amount and type of alcohol over the same time period, and your results came back with a much lower BAC. Sounds extreme, but people have conducted their own tests of this sort before.

Getting the Blood Re-Tested

Determining your BAC level based on a drinking pattern can be very difficult, especially for the layperson. While experts can disagree on a person’s BAC at the time they were driving, blood results tend to be accurate, though not infallible. Conversely, breath samples have more room for error due to factors, such as body weight, gender, medical conditions (e.g. diabetes), use of mouthwash, time since last drink, etc.

Most of the independent labs used by DUI attorneys test for BAC level and the basic blood type. There certainly have been cases in the past where fermentation led to a false reading; false readings can arise when the blood has been left in ambient temperature for too long. Blood samples can even coagulate when they have been compromised. Getting a blood split to independently retest your blood sample can be a problem if your attorney isn’t familiar with the process.

Can I Get a DNA Test?

But what about DNA testing? DNA tests can be costly; the best thing to do is consider getting a blood split, meaning get the blood sample retested. If you are still dissatisfied with the results, you can discuss the pros and cons of getting a DNA test with your DUI defense attorney.

To learn more about blood splits and the DUI defense strategies available to you, contact an Orange County DUI lawyer from the Law Offices of Virginia L. Landry, Inc.!