The Tennessee Court of Criminal Appeals upheld the conviction of Kevin Ray Roark for driving under the influence (DUI), a Class A misdemeanor. The court ruled on October 27, 2026, that the trial court did not violate Roark's rights by excluding an expert witness and found sufficient evidence to support his conviction. This decision impacts Roark, who received a suspended sentence of eleven months and twenty-nine days with ninety days to serve, and sets a precedent for similar DUI cases in Tennessee.

Roark's case began when he was stopped by Trooper Austin Burchett of the Tennessee Highway Patrol on November 9, 2023. During the stop, Burchett detected the odor of marijuana and alcohol, and observed Roark's bloodshot eyes. Although Roark was driving under the speed limit, Burchett conducted a series of field sobriety tests, which Roark struggled to complete. The trooper later found a THC vape pen and an open can of beer in Roark's vehicle. A blood test confirmed the presence of marijuana in Roark's system.

Roark contested his conviction on several grounds, including the exclusion of an expert witness who was meant to testify about field sobriety tests. He argued that the trial court's decision violated his constitutional right to present a defense. The court filing indicated that the State had requested discovery just two days before the trial, which Roark's defense claimed did not provide enough time to prepare a report for the expert witness. The trial court ruled against Roark, stating that allowing expert testimony without a report would be unfair to the prosecution.

In addition to the expert witness issue, Roark also challenged the admission of the State's drug-impairment expert, Trooper Burchett. He argued that the court failed to conduct the necessary reliability analysis before allowing Burchett to testify. However, the court found that Roark did not object to Burchett's qualifications at trial, which led to the waiver of this issue on appeal.

The court ruled, "The Defendant's assertion in his motion for a new trial that evidence was 'critical' alone is insufficient to preserve a constitutional claim." This statement reflects the court's view that proper procedures must be followed to preserve issues for appeal.

Furthermore, the court addressed Roark's argument regarding the sufficiency of the evidence. Roark claimed that the only traffic violation was an inoperative tag light and that the evidence did not prove impairment beyond a reasonable doubt. However, the court concluded that the evidence, including the testimony of the trooper and the blood test results, was sufficient to support the conviction.

The ruling from the Tennessee Court of Criminal Appeals emphasizes the importance of adhering to procedural rules in criminal cases. It highlights that defendants must preserve their rights by raising objections during trial and providing adequate records for appeal. This case serves as a reminder for future defendants about the critical nature of proper legal representation and the necessity of following established legal protocols.

Looking ahead, Roark's options for appeal are limited. The court's decision is final unless further challenged in a higher court. There are no related cases pending that could affect this ruling. The outcome of Roark's appeal may influence how future DUI cases are handled, particularly regarding the admissibility of expert testimony and the sufficiency of evidence in similar circumstances.