Individuals are protected from unreasonable seizures by both the U.S. and Washington Constitutions. Warrantless seizures are unreasonable unless an exception applies, and it is the state that must establish that an exception exists. A traffic stop is considered a seizure. For a warrantless traffic stop to be constitutional, there must be a reasonable articulable suspicion of criminal activity or a traffic infraction. The scope of the stop must be reasonably limited.
A Washington appeals court recently considered whether the state had a reasonable articulable suspicion when it was undisputed that the defendant had crossed the fog line for about 200 feet. A state patrol trooper was driving behind the defendant and observed her drive two wheels of her vehicle over the fog line for about 200 feet. The trooper pulled the defendant over. She submitted to sobriety tests, and the trooper arrested her for driving under the influence after observing clues of intoxication.
The defendant moved to suppress the evidence from the stop, and she moved for dismissal, arguing that the trooper did not have a reasonable suspicion to justify the stop. The state argued that the defendant committed an infraction when she drove on the shoulder.