A recent decision by the Ohio Supreme Court addresses a common issue in criminal cases: when a police officer has more than one reason to stop a vehicle, what happens if one of those reasons disappears? Must the officer immediately end the stop, or may the investigation continue based upon another independent justification? While this case did not involve a DUI (called ‘OVI’ in Ohio), its holding has significant implications for Ohio OVI investigations.
Traffic Stop Leads to Felony Charges
The case is State v. Mathis. The Euclid police received a report of an armed robbery. Witnesses described the suspect vehicle as a gold or tan Dodge or Chrysler minivan with a license plate possibly beginning with the letters “TWL.”
Two days later, a Euclid police officer observed Rasheed Mathis driving a light blue Chrysler minivan. The officer initially noticed the vehicle because its windows appeared to be illegally tinted. As he moved closer, he also believed the vehicle might match the description of the robbery suspect’s vehicle.
The officer initiated a traffic stop. Once he approached the vehicle, however, he immediately realized that the vehicle’s color and license plate did not match the description from the robbery investigation. Nevertheless, he continued the traffic stop. During the encounter, officers detected the odor of burnt marijuana and observed burnt marijuana inside the vehicle. After asking Mathis to exit the vehicle, officers discovered that he was carrying a loaded firearm despite being legally prohibited from possessing one. Mathis was subsequently charged with multiple felony offenses.
Evidence Suppressed
Mathis filed a motion to suppress the evidence, arguing that once the officer realized his vehicle did not match the robbery suspect’s vehicle, the officer was constitutionally required to end the traffic stop. The trial court agreed and suppressed the evidence seized subsequent to the stop. The Eighth District Court of Appeals affirmed. The State appealed to the Ohio Supreme Court.
Ohio Supreme Court Reverses
The question before the Ohio Supreme Court was straightforward: whether a police officer who initiates a traffic stop of a motorist with multiple independent bases for reasonable suspicion that the motorist is committing or had committed a crime must abandon that traffic stop if the officer’s subsequent investigation extinguishes one—but not all—of the bases for his reasonable suspicion.
The Court answered no. The Court held that an officer who initiates a traffic stop based upon multiple independent grounds for reasonable suspicion is not required to abandon the stop simply because one of those grounds later proves incorrect. If another objectively valid basis for the stop remains, the detention may continue.
In Mathis’s case, even assuming the robbery investigation no longer justified the detention after the officer noticed the discrepancies in the vehicle description, the officer still possessed an independent basis for the stop: reasonable suspicion that the vehicle’s window tint violated Ohio law. The officer’s observations were later confirmed by testing, which showed the tint transmitted only 12 percent of visible light—far darker than Ohio law permits.
The Ohio Supreme Court’s Rationale
The Court emphasized a long-established principle of Fourth Amendment law: the constitutionality of a traffic stop is determined objectively, not subjectively. In other words, courts do not ask why the officer actually wanted to stop the vehicle. Instead, they ask whether the facts known to the officer at the time provided an objectively reasonable basis to believe that a traffic or criminal violation had occurred.
The trial court had focused on the officer’s subjective motivation, finding that the stop “wasn’t about tinted windows” but instead about investigating the robbery. The Supreme Court concluded that this was the wrong legal analysis. Under longstanding United States Supreme Court and Ohio precedent, an officer’s personal motivation does not determine whether a stop is constitutional. The relevant question is simply whether an objectively valid basis for the stop existed.
Because the officer independently possessed reasonable suspicion that Mathis was violating Ohio’s window tint law, the traffic stop remained lawful even after the robbery suspicion weakened.
The Court’s Rationale Was Consistent with Precedent
The Ohio Supreme Court’s decision in State v. Mathis did not create a new Fourth Amendment doctrine. Instead, it built upon two important traffic-stop decisions: Whren v. United Statesvv and Dayton v. Erickson. In Whren, the United States Supreme Court held that a traffic stop is constitutionally reasonable whenever officers have probable cause or reasonable suspicion to believe a traffic violation has occurred, regardless of the officers’ underlying motivations. A few months after Whren, the Ohio Supreme Court decided Dayton v. Erickson. In Erickson, the Court held that, where a police officer stops a vehicle based on probable cause that a traffic violation has occurred or was occurring, the stop is not unreasonable under the Fourth Amendment, even if the officer had some ulterior motive for making the stop, such as a suspicion that the violator was engaging in more nefarious criminal activity.
Why the Mathis Decision Matters in Ohio OVI Cases
Although Mathis did not involve impaired driving, the decision will almost certainly be cited in Ohio OVI litigation. Many OVI investigations begin as ordinary stops for traffic violations. Defense attorneys sometimes challenge these stops by arguing that the officer’s stated reason for initiating the stop was mistaken or pretextual. Mathis reinforces that these arguments will often face an uphill battle.
That does not mean every traffic stop is automatically lawful. Officers must still possess reasonable suspicion or probable cause supporting the initial stop. In addition, officers may not unlawfully prolong a traffic stop for an OVI investigation without additional reasonable suspicion the driver is under the influence.
About the Author: Shawn Dominy is a leading DUI/OVI lawyer in Ohio and the founder of the Dominy Law Firm in Columbus, Ohio. The Dominy Law Firm is recognized in Best Law Firms In America® for DUI defense and criminal defense and holds an A+ rating with the Better Business Bureau.
Shawn Dominy is the past President of the Ohio Association of Criminal Defense Lawyers, the state delegate to the National College for DUI Defense and a founding member of the national DUI Defense Lawyers Association. He is rated “AV Preeminent” by Martindale Hubbel®, was named by SuperLawyers® as one of the top 50 lawyers in Columbus, Ohio, and is recognized in Best Lawyers In America®for DUI defense and criminal defense.
Shawn Dominy authored the Ohio DUI/OVI Guide, the Ohio Vehicular Homicide Guide, and the Ohio Vehicular Assault Guide. He also wrote a chapter of Defending DUI Vehicular Homicide Cases (2012, West/Aspatore) and contributed a section of Drunk Driving Defense, 9th Edition (2021, Walters Kluwer). His magazine articles have been featured in state and national publications, and he is a frequent speaker at seminars in which he teaches other lawyers about DUI/OVI, serious vehicular crimes, and trial skills.
Shawn Dominy can be reached through his law firm’s website: Dominy Law Firm.
