United States V. Brignoni-Ponce - Court's Decision

Court's Decision

The Court took into question where the line was drawn between the state's interest in protecting the border from illegal entry and protections provided by the Fourth Amendment. The Border Patrol has the nearly impossible task of securing a 2,000-mile long border where many people illegally cross on foot and then are transported by smugglers in private cars. To ensure the safety of the border, it is necessary for the Border Patrol to stop suspicious vehicles that may be carrying illegal aliens and investigate their right to be in the United States.

In contrast to the state’s interest, individuals must be protected from unreasonable interference in their privacy. According to the precedent set in Terry v. Ohio and Adams v. Williams, under appropriate circumstances, a roving patrol may perform a limited search and seizure without having probable cause to arrest the person. These circumstances include information that the person may have drugs or weapons, a visual scan of the person’s vehicle reveals something suspicious or as in this case a visual reason to believe that the person is carrying illegal aliens into the country.

Some examples of what constitutes as suspicion of carrying illegal aliens include driving a station wagon with fold down seats or spare tires removed to conceal aliens, having a low riding vehicle, having an overly packed vehicle, or driving erratically. Also, the officer's knowledge of the area, experience, and training in dealing with illegal aliens dictates the decision to pursue a search. Thus, an officer must have one of these articulable facts in order stop someone and question their citizenship.

However, in this case the defendants were stopped for one reason: solely on the basis of their appeared Mexican ancestry. The court concluded that this reason alone made the stop unreasonable. The lack of articulable facts to generate suspicion that the car was carrying illegal aliens meant that this search was illegal. There are millions of people living in the area around San Diego that are naturalized and native-born of Mexico and "even in the border area, a small proportion of them are aliens." It is unreasonable to assume that any person who appears Mexican is an illegal alien or could be transporting illegal aliens. To allow such unrestricted roving patrol stops would be to subject all residents of the border area to unreasonable searches and seizures just because of their ethnicity, therefore the stop of the defendant was a violation of the Fourth Amendment and the charges were dropped.