Police may briefly detain a driver to investigate suspected DUI only when objective facts create reasonable suspicion, and minor lane movements do not automatically meet that threshold. In a recent Pennsylvania case, the Commonwealth challenged an order excluding evidence obtained after an early-morning traffic stop based largely on four contacts with a fog line. The decision matters because it confirms that courts must examine the whole driving pattern and defer to supported credibility findings. If you are facing alcohol or drug-related charges, you should speak with a knowledgeable Pennsylvania DUI defense attorney about whether police had a lawful basis for the stop.
Case Setting
Reportedly, at approximately 2:40 a.m., a state trooper saw the defendant’s vehicle touch the fog line while entering Route 119 South in Westmoreland County. The trooper began following in a marked patrol vehicle equipped with a mobile video recorder. During the next five to six miles, the defendant maintained a lawful speed, used turn signals, stayed in the proper lane, and committed no notable irregularity. Near another intersection, the vehicle contacted the fog line twice more, about ten seconds apart. In total, the trooper described two touches and two crossings, with the crossings extending about one tire-width beyond the line.
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