Background
A citizen reported seeing a black Ford pickup swerving on Interstate 39, failing to remain in its lane, and nearly striking other vehicles. The citizen followed the pickup to a restaurant parking lot and provided its location and license plate number. Within minutes, a Wisconsin state trooper found the identified pickup at that location and saw Frederick Schwenck alone in the driver’s seat, slumped over the center console.
After the trooper knocked on the window, Schwenck appeared to wake up. He said that he was returning from a work party in Wausau and taking a break from driving, but could not identify where in Wausau the party had occurred. The trooper heard Schwenck slur his speech, asked him to exit the pickup, and then detected an odor of intoxicants. Following field sobriety testing, the trooper arrested Schwenck for operating while intoxicated and requested a blood test under Wisconsin’s implied-consent law. Schwenck refused, and the circuit court ordered his operating privileges revoked for 12 months.
The Court’s Holding
The Wisconsin Court of Appeals affirmed. It held that the trooper had reasonable suspicion to extend Schwenck’s temporary detention to administer field sobriety tests. The court emphasized the totality of the circumstances rather than treating any fact as independently decisive.
Those circumstances included the trooper’s training and experience, the citizen’s facially reliable real-time report of dangerous driving, the prompt confirmation of the pickup’s identity and location, Schwenck’s position slumped over the console shortly after driving, his slurred speech, and the odor of intoxicants detected before testing began. Together, these facts provided ample reason to suspect impaired driving and to use field sobriety tests to confirm or dispel that suspicion. The court addressed only the challenged extension of the detention for testing and did not separately decide whether probable cause supported the later OWI arrest.
Key Takeaways
- A contemporaneous citizen report can support reasonable suspicion when police promptly corroborate identifying details and location.
- Facts that may have innocent explanations, such as sleeping in a parked vehicle or slurred speech after waking, must be evaluated collectively and in context.
- The ruling was limited to whether reasonable suspicion justified extending the detention for field sobriety tests; it did not independently adjudicate the lawfulness of the subsequent OWI arrest.
Why It Matters
The decision illustrates Wisconsin’s totality-of-the-circumstances approach to field sobriety testing. Courts may consider several individually ambiguous observations as cumulative “building blocks” of reasonable suspicion, and officers need not adopt an innocent explanation when the combined facts reasonably suggest impairment.
For implied-consent refusal proceedings, the legality of investigative steps preceding a chemical-test request can affect whether revocation is proper. Here, because the extension for field sobriety testing was supported by reasonable suspicion, Schwenck’s appellate challenge did not provide a basis to overturn the revocation judgment.