United States v. Robinson
The Supreme Court ruled that once police make a lawful full custodial arrest, they may thoroughly search the person arrested without any additional justification, upholding a police search that turned up heroin in a cigarette pack taken from a man arrested for driving with a revoked license.
The decision rejects a lower court's attempt to limit such searches to a narrow weapons pat-down when the underlying crime wouldn't produce evidence, establishing instead a categorical rule that the fact of a lawful arrest alone justifies a full search of the person.
“It is the fact of the lawful arrest which establishes the authority to search, and we hold that in the case of a lawful custodial arrest a full search of the person is not only an exception to the warrant requirement of the Fourth Amendment, but is also a "reasonable" search under that Amendment.”
The Court's core holding that a lawful arrest alone justifies a full search of the person.
How it got here: A federal trial court denied suppression and convicted the man; the D.C. Circuit, sitting en banc, reversed on Fourth Amendment grounds; the government sought and received Supreme Court review.
The Case in Depth
What happened
A District of Columbia police officer arrested a driver for operating a vehicle after his license had been revoked, a traffic offense carrying mandatory jail time. During a routine custodial search, the officer felt an object in the man's coat pocket, removed a crumpled cigarette pack, and opened it to find heroin capsules. The man was later convicted of drug offenses based partly on that evidence.
The question before the Court
When police make a full custodial arrest, can they thoroughly search the person even if the crime doesn't involve evidence and the officer never suspected he had a weapon?
Why it matters
The ruling gives police officers broad, bright-line authority to fully search anyone they take into custody, regardless of the offense or whether the officer suspects a weapon or evidence. That means items found in pockets, wallets, or containers during routine arrests—even for minor traffic offenses—can be opened and used as evidence without a warrant or extra justification.
What changes now
Because this is a final merits decision, the D.C. Circuit's ruling suppressing the heroin evidence is undone, and the conviction based on that evidence stands. The rule announced here — that any lawful custodial arrest automatically permits a full search of the person — became the governing standard for searches incident to arrest nationwide, without further case-specific findings required.
What this does not decide
The Court did not decide what happens with a routine traffic stop where police only issue a citation instead of making a full custodial arrest, nor did it resolve questions about searches that might be used as a pretext for unrelated investigations. It left those situations for future cases.
Concurrences and dissents
Concurrence — Justice Powell
Justice Powell agreed with the outcome but offered a different rationale: once a custodial arrest is lawful, the person retains no significant Fourth Amendment privacy interest, so no independent justification for a search is needed at all. He framed the arrest itself, not the search, as the key intrusion the Constitution regulates.
Dissent — Justice Marshall
“The majority's approach represents a clear and marked departure from our long tradition of case-by-case adjudication of the reasonableness of searches and seizures under the Fourth Amendment.”The dissent's central objection to the majority's categorical rule.
Justice Marshall argued the majority abandoned the Court's tradition of deciding search-and-seizure reasonableness case by case. He would have held that removing the unidentified object and then opening the cigarette package exceeded what was needed to protect the officer or prevent escape, especially since the government conceded the officer wasn't looking for weapons or evidence, and would have suppressed the heroin.
How the Court got there
The legal reasoning, step by step
- The Court distinguished between a search incident to a lawful arrest, which covers the arrestee's person, and a limited protective frisk under Terry v. Ohio — a lesser standard that lets an officer pat down someone's outer clothing for weapons even without probable cause to arrest. The Court held these are different categories governed by different rules.
- Because Terry's narrower frisk rule applies only when police lack probable cause to arrest, the Court concluded it could not be imported into situations, like this one, where the officer already had probable cause and made a full custodial arrest.
- The Court reviewed a long line of its own prior decisions and concluded that the authority to search an arrestee's person incident to a lawful arrest had always been treated as settled and unqualified, unlike the separate, more contested question of how much surrounding area police may search.
- The Court rejected the idea that the reach of a search should depend on whether the specific crime of arrest could yield evidence, reasoning that the justification for a full search rests equally on the need to disarm a suspect being taken into custody, not just on the chance of finding evidence.
- The Court held that a lawful custodial arrest itself — regardless of the crime or the officer's subjective suspicions — automatically supplies the authority to conduct a full search of the person, without requiring a case-by-case showing that weapons or evidence were likely to be found.
Doctrinal impact
Cases affected by this decision
Distinguishes Terry v. Ohio (392 U.S. 1)
The Court said Terry's rule for limited weapons pat-downs without probable cause doesn't apply to full arrests based on probable cause.
Limits Peters v. New York (392 U.S. 40)
The Court rejected reading a stray sentence in Peters as limiting the scope of searches incident to a lawful arrest.
Reaffirms Chimel v. California (395 U.S. 752)
The Court relied on Chimel's recognition that officers may search an arrestee's person to remove weapons and preserve evidence.