If you are pulled over and a police officer suspects that you are intoxicated, he can ask you to submit to a series of sobriety tests. Generally, the officer will use your performance on these tests to justify asking you to take breath or blood test.
There are specific steps which must be taken when a breath or blood test are administered. If these steps are not followed exactly, then it is possible in some circumstances to have the results of the tests thrown out in some situations. Examples include the following: the machine was not properly calibrated or maintained, the person who took the test was not licensed to take the test, and there is not a full study showing who all touched the sample from the time it was taken to the time it was analyzed. For more information, please visit, Alcohol Related DUI Driving in Colorado