The Massachusetts Court of Appeals held that pretextual inventory searches do not comport with the Fourth Amendment in the case of Commonwealth v. Lek. In the Lek case from Lowell the police detective conceded that he was using traffic infractions in order to detective gang activity. In other words, traffic stops were being made not to enforce the traffic laws but with the hopes that guns, drugs or other evidence of gang activity would be discovered during the stop.
What happened in the Lek case?
The Detective and his partner were in plainclothes in an unmarked police car. According to the Detective, he and his partner were looking for motor vehicle violations to address gang suppression through motor vehicle stops. the Detective testified that he was not required to do traffic enforcement that night and was doing it by his own free will.