Whether DEA agents had reasonable suspicion under the Fourth Amendment to stop Sokolow at the Honolulu airport.
Holding
Yes. Considering the totality of the circumstances, the agents had a reasonable, articulable basis to suspect that Sokolow was transporting illegal drugs.
Reasoning
Under Terry v. Ohio, officers may briefly detain a person when specific, articulable facts create reasonable suspicion that criminal activity may be afoot. Reasonable suspicion requires more than a hunch, but it is substantially less demanding than probable cause and cannot be reduced to a rigid set of rules.
The Ninth Circuit improperly divided the evidence into two categories: evidence of “ongoing criminal behavior” and merely “probabilistic” drug-courier characteristics. The Fourth Amendment instead requires a practical assessment of the whole picture. Facts do not become categorically decisive or categorically irrelevant simply because they can also have innocent explanations.
The facts known to the agents were collectively significant: Sokolow paid a substantial sum for tickets in cash from a large roll of small bills; he appeared to be traveling under a name inconsistent with the telephone information he gave the airline; he made an unusually brief trip from Honolulu to Miami; he was nervous; and he checked no luggage. Each fact could be innocent in isolation, but their combination reasonably suggested drug trafficking.
The Court reaffirmed that lawful conduct may generate reasonable suspicion when viewed in context. The relevant inquiry is not whether each individual act is innocent or guilty, but the degree of suspicion that attaches to the combination of noncriminal acts.