Denver, CO criminal defense attorney Michael Sheehan discusses the possible defenses that might be raised in a CO DUI case. He explains that in DUI cases, an experienced attorney looks to challenge the results of a blood or breath test, or, in cases where the suspect refused testing, explore whether there is a valid justification for the refusal. He interviews his client, examines all the facts and circumstances, and develops the strongest possible defense tailored to that individual case.