Background
Illinois State Police Sergeant Mark Flack stopped Robert Pennington, Jr. for speeding on Interstate 57. After issuing a warning and returning Pennington’s documents, Flack continued questioning him for approximately three minutes about his nervousness, possible drugs, consent to search, and whether he was on parole or probation. Pennington refused consent and eventually left. Flack then alerted canine officer Sergeant John Lillard, describing Pennington’s vehicle and drug-related criminal history.
About an hour later, Lillard saw Pennington commit an improper-lane-usage violation and initiated a second stop. While computer problems delayed preparation of a warning, Lillard questioned Pennington and arranged for another officer to finish the warning while he conducted a dog sniff. The dog alerted before the warning was issued, and a vehicle search uncovered crack cocaine. After the district court denied Pennington’s suppression and dismissal motions, he entered a conditional guilty plea and appealed.
The Court’s Holding
The Seventh Circuit affirmed. The majority held that Flack violated the Fourth Amendment by continuing to detain and question Pennington after completing the first stop’s traffic-related mission. The encounter was not consensual because a reasonable person in Pennington’s position—seated inside Flack’s squad car, subjected to continued questioning, and given no answer when asking to leave—would not have felt free to end it.
Suppression nevertheless was unwarranted because the evidence recovered during the second stop was sufficiently attenuated from the first stop’s illegality. About an hour had elapsed, Lillard independently observed a new traffic violation, and Flack’s conduct was not sufficiently purposeful or flagrant to make exclusion appropriate. The majority also held that the second stop was not unlawfully prolonged: the records checks and questioning occurred while officers were still handling the warning, the technical delay was not purposeful, and the dog sniff did not extend the stop. Finally, Pennington failed to make the prima facie showing of discriminatory purpose required for an evidentiary hearing on his selective-enforcement claim.
Key Takeaways
- Continuing to detain and question a driver after issuing a warning and returning the driver’s documents can unlawfully prolong a traffic stop.
- An unlawful first stop does not automatically require suppression of evidence found during a later stop when an intervening traffic violation and other circumstances sufficiently attenuate the evidence from the earlier illegality.
- A dog sniff conducted while officers are still diligently completing a traffic warning does not violate the Fourth Amendment if it does not add time to the stop.
- A selective-enforcement claimant seeking an evidentiary hearing must present facts raising a reasonable doubt that officers acted with a discriminatory purpose.
Why It Matters
The decision addresses how courts should evaluate coordinated, successive traffic stops. The majority treated Pennington’s new traffic violation as an intervening event and examined whether the second stop itself was reasonably conducted, even though the first officer had unlawfully prolonged the initial detention and alerted the second officer after Pennington refused consent to search.
Judge Hamilton dissented, arguing that the officers’ coordination and redundant records checks unnecessarily prolonged the second stop to facilitate the dog sniff. In his view, the two stops should have been considered together and the evidence suppressed.