Can ultra-cautious driving justify a DUI traffic stop? Salt Lake City v. Bench Explained

The Utah Court of Appeals addressed the limits of reasonable suspicion in DUI investigations in Salt Lake City v. Bench, examining whether cautious driving and a tip from a potentially biased informant can justify a traffic stop.

Background and Facts

Officer Hudson received a dispatch report that Tim Bench’s ex-wife had called 911, reporting that Bench had transported their children while intoxicated after dropping them off at her home. When Hudson spotted Bench’s vehicle thirty blocks away, he followed for two blocks, observing that Bench drove approximately 10 mph below the speed limit and signaled for five seconds before changing lanes—two seconds longer than legally required. Hudson found no driving or equipment infractions before initiating the stop, which led to Bench’s DUI arrest. The trial court granted Bench’s motion to suppress, finding insufficient reasonable suspicion for the stop.

Key Legal Issues

The court addressed whether Officer Hudson had reasonable, articulable suspicion of criminal wrongdoing based on the dispatch report and his observations of cautious driving. The case also examined whether public safety concerns in DUI cases lower the threshold for establishing reasonable suspicion.

Court’s Analysis and Holding

The court applied a three-factor test for evaluating informant tips: the type of informant, detail provided, and corroboration by law enforcement. While acknowledging that identified citizen-informants are generally reliable, the court noted that an ex-wife’s veracity may be questionable due to potential bias from divorce. The ex-wife provided only a conclusory statement about intoxication without supporting details. Crucially, the court held that Bench’s ultra-cautious driving was “commendable” rather than suspicious, stating that “safe, ultra-cautious driving, even if motivated by a desire to avoid police contact, does not, without more, create reasonable suspicion.” The court rejected the City’s argument that public safety concerns justify lowered standards for DUI stops.

Practice Implications

This decision establishes important boundaries for Fourth Amendment protections in traffic stops. Practitioners should note that cautious, legal driving behavior cannot support reasonable suspicion, even when combined with unsubstantiated tips. When challenging stops based on informant tips, emphasize any potential bias and demand detailed, corroborating evidence of criminal activity beyond mere conclusions.