DHS has a secretive predictive policing unit that's analyzing Americans' financial habits and traffic patterns to justify traffic stops without any evidence of actual crime. A cop stop in the video was based on "information contained within law enforcement-sensitive systems suggesting financial activity patterns commonly associated with illicit narcotics activity." In other words, someone's bank account looked suspicious to an algorithm. This is pre-crime policing. Pull you over because the system thinks you might maybe commit something. Constitutional protections are just suggestions at this point.