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Mistakes Can Occur During DWI Blood Test ProcessThough more accurate than a breath test, a blood test can still have inaccurate results in a driving while intoxicated case. There are many chances for a blood sample to become contaminated during the process, resulting in the sample showing a higher blood alcohol concentration level than was actually in the driver’s blood at the time of the arrest. An experienced DWI defense attorney knows where errors are likely to occur in the blood test process that may make the test results inaccurate and inadmissible in court.

Blood Drawing

Mistakes in taking the suspect’s blood can contaminate the sample from the start. A police officer drawing your blood is not always as skilled as a medical professional. The officer may make a mistake by:

  • Waiting too long to draw the blood sample;
  • Contaminating the sample with the alcohol swab used to clean the extraction site on the skin; or
  • Drawing a blood clot, which has a higher concentration of blood alcohol than a normal blood sample.

You may need to recount possible mistakes made during the blood drawing process, as the person drawing the blood is not required to testify.

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