A Gwinnett County jury found Mychal H. Walker guilty of DUI —less safe driver. He appeals and contends solely that the trial court erred in denying his motion to suppress evidence of his “refusal” to submit to a breath test. His several claims are each premised on the fact that the air flow sensor on the Intoxilyzer 5000 EN machine is not calibrated to produce an accurate numeric air flow volume. Finding no error, we affirm. When an appellate court reviews a trial court’s order concerning a motion to suppress evidence, the appellate court should be guided by three principles. First, the trial judge sits as the trier of facts. The trial judge hears the evidence, and his findings based upon conflicting evidence are analogous to the verdict of a jury and should not be disturbed by a reviewing court if there is any evidence to support the findings. Second, the trial court’s decision with regard to questions of fact and credibility must be accepted unless clearly erroneous. Third, the reviewing court must construe the evidence most favorable to uphold the trial court’s findings and judgment.1 In reviewing a trial court’s decision on a motion to suppress, all relevant evidence of record, including trial testimony as well as the testimony offered at the suppression hearing, may be considered.2 With these principles in mind, the evidence shows that the DUI charge arose after Walker was stopped at 2:30 a.m. pursuant to a routine sobriety-check roadblock erected at the intersections of Peachtree Industrial and Holcomb Bridge Road. A strong odor of alcohol, slurred speech, and bloodshot eyes led to a request for voluntary performance of field sobriety exercises and Walker’s acquiescence in their performance; the results of the exercises led to Walker’s arrest for driving under the influence of alcohol.
The arresting officer in this case, S. Schunk, is a POST-certified veteran with the Gwinnett County Police Department’s DUI force who has investigated “thousands” of potential DUI suspects. Schunk testified that, following Walker’s arrest and the reading of implied consent, Walker
