What Should I Know About DUI Blood Tests in Colorado?

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Did you take a blood test when arrested for an alleged DUI? What happened to the test after they drew blood?

In this video, former Deputy District Attorney and Denver DUI defense attorney Jason Wolfe explains the process of drawing blood from an accused driver in Colorado. It is extremely important that a person’s second vial of blood is held for the accused to be able to independently test with his own expert.

If you have been arrested and accused of a DUI in Colorado or driving while under the influence of marijuana, do not speak to the police without a criminal defense attorney at your side. Schedule an appointment via the contact form on this site, or call us directly at 720-961-8985.


The blood test will be done, again, if assuming that it’s done by, according to Colorado Department of Health rules and regulations, it needs to be done by a certified phlebotomist or a nurse or an EMT or somebody who knows what they’re doing. The officer won’t be conducting that blood draw. It’ll be done either at a detox facility or at a hospital typically, and that blood draws done again according to Colorado regs, they’re supposed to take two vials of your blood, one for their sampling or rather one for
their testing, and then another for the testing of the suspect at a lab of their choosing. That second sample is held and if the suspect wants to retest it they certainly can. The state test is sent off to one of the labs that are used, usually takes between four to eight weeks to get the test results back and that will then determine how the district attorney proceeds.

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