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City of Watertown v. Perschke

Citations: 922 N.W.2d 323; 2018 WI App 71; 384 Wis. 2d 633Docket: Appeal No. 2018AP555

Court: Court of Appeals of Wisconsin; October 18, 2018; Wisconsin; State Appellate Court

Narrative Opinion Summary

The case involves an appeal by an individual convicted of operating a motor vehicle under the influence and with a prohibited alcohol concentration, challenging the constitutionality of the traffic stop that led to his conviction. Initially found guilty by the City of Watertown Municipal Court, the defendant appealed to the Jefferson County Circuit Court, which denied his motion to suppress evidence, arguing the traffic stop lacked reasonable suspicion. The traffic stop occurred when an officer used a stationary radar device, calibrated and tested for accuracy, to clock the defendant speeding at 38 mph in a 25 mph zone, despite the video device showing zero speed. The circuit court conducted hearings and found the officer's testimony credible, supporting the radar's proper functionality. It concluded that reasonable suspicion existed, a finding the appellate court upheld after a de novo review. The appellate court affirmed the conviction, determining that the radar reading provided specific and articulable facts for the stop, aligning with the statutory requirement under WIS. STAT. 346.57(4). The judgment was affirmed without publication, and the decision was made by a single judge pursuant to Wis. Stat. 752.31(2)(c).

Legal Issues Addressed

Credibility of Evidence in Traffic Stops

Application: The circuit court found the officer’s testimony credible regarding the functionality of the radar device, despite the integrated video device showing zero speed.

Reasoning: The court rejected the argument that the video device's failure to show speed undermined credibility, asserting that reasonable suspicion was present to justify the traffic stop.

Functionality of Radar Devices in Traffic Stops

Application: The court ruled that the radar device was functioning properly and provided reliable evidence of the speeding violation, despite the malfunction of the integrated video device.

Reasoning: The court upheld the finding that the radar device was operable, based on credible testimony from the officer, who confirmed he relied solely on the radar for the speed determination.

Reasonable Suspicion for Traffic Stops

Application: The court determined that the officer had reasonable suspicion to conduct the traffic stop based on the reading from the stationary radar device, which indicated the defendant was speeding.

Reasoning: Traffic stops must be reasonable, supported by specific and articulable facts that lead a reasonable officer to suspect a crime is occurring or has occurred.

Standard of Review for Reasonable Suspicion

Application: The court upheld the circuit court’s historical fact findings as not clearly erroneous and conducted a de novo review to confirm reasonable suspicion for the traffic stop.

Reasoning: The standard of review for determining whether an officer had reasonable suspicion involves a two-step analysis. First, the court reviews the circuit court's historical fact findings, which are upheld unless clearly erroneous. Second, the court assesses the determination of reasonable suspicion de novo.