Can Utah district courts relitigate suppression motions during trial de novo proceedings? Smith v. Hon. Hruby-Mills Explained

In Smith v. Hon. Hruby-Mills, the Utah Court of Appeals addressed whether district courts must rehear motions to suppress evidence during trial de novo proceedings when the same court previously ruled on the motion during a hearing de novo.

Background and Facts
Smith was charged with DUI in Salt Lake City Justice Court. After successfully moving to suppress evidence based on lack of reasonable suspicion for the traffic stop, the prosecution appealed under Utah Code § 78A-7-118(6), seeking a hearing de novo in district court. The district court denied Smith’s motion and remanded to justice court, where Smith pleaded guilty. Smith then appealed his conviction, triggering his right to a trial de novo under § 78A-7-118(1). When assigned to the same judge, Smith refiled his suppression motion, but the court declined to rehear it, citing res judicata.

Key Legal Issues
The primary issue was whether Utah’s bifurcated justice court appeal system permits defendants to relitigate suppression motions during trial de novo proceedings after adverse rulings in prior hearings de novo. The court also analyzed the application of res judicata and law of the case doctrines in this unique procedural context.

Court’s Analysis and Holding
The court rejected the application of res judicata, finding that hearing de novo and trial de novo constitute parts of a single, continuous proceeding rather than separate cases. However, the court applied the second branch of the law of the case doctrine, which gives district courts discretion—but does not require them—to reconsider prior rulings by co-equal courts. The court distinguished this from the first branch, which mandates adherence to appellate court decisions.

Practice Implications
This decision clarifies that district courts have flexibility in handling prior hearing de novo rulings during trial de novo proceedings. Practitioners should present compelling reasons for reconsideration, such as intervening changes in controlling authority, newly available evidence, or clear error that would work manifest injustice. The ruling also confirms that the same judge may preside over both proceedings without automatic disqualification.