The State now appeals. When we review a motion to suppress evidence, we will uphold the circuit court's findings of fact unless they are clearly erroneous. However, the application of constitutional principles to those facts is a question of law that we decide without deference to the circuit court's decision. The Fourth Amendment prohibits unreasonable searches and seizures. See U.S. Const.
Statements given and items seized during a period of illegal detention are inadmissible.
The same standards which have been established for rights arising under the United States Constitution apply to rights derived from the Wisconsin Constitution. See id . at 21-22. The question of what constitutes reasonable suspicion is a common sense test. The test is designed to balance the personal intrusion into the suspect's privacy occasioned by the stop against the societal interests in solving crime and bringing offenders to justice. Matejka does not dispute that Forsythe had reasonable suspicion to stop the driver of the van for a traffic violation.