Lange v. California
The Supreme Court ruled that police cannot automatically enter a fleeing misdemeanor suspect's home without a warrant — officers must examine the specific facts of each situation to determine whether a genuine emergency justifies skipping the usual warrant requirement.
The decision resolves a long-running split among courts nationwide, requiring case-by-case assessments rather than a blanket rule whenever a misdemeanor suspect runs from police into their home.
“We hold it does not. A great many misdemeanor pursuits involve exigencies allowing warrantless entry. But whether a given one does so turns on the particular facts of the case.”
The Court's core holding that pursuit of a misdemeanor suspect does not automatically justify entering a home without a warrant.
How it got here: California courts upheld the warrantless garage entry under a categorical rule allowing such entries in all misdemeanor pursuits; the Supreme Court agreed to resolve a nationwide split among courts on this question.
The Case in Depth
What happened
Arthur Lange was driving in Sonoma, California, with loud music playing and repeatedly honking his horn when a highway patrol officer began following him. When the officer turned on his lights to signal a stop, Lange drove to his home and pulled into his attached garage. The officer followed him in without a warrant, questioned him, and conducted field sobriety tests after observing signs of intoxication. A blood test later showed his blood-alcohol level was more than three times the legal limit, and he was charged with misdemeanor drunk driving.
The question before the Court
Can police always follow a misdemeanor suspect into their home without a warrant when the suspect flees?
The Court's answer
No — police pursuit of a misdemeanor suspect does not automatically create the kind of emergency that lets officers skip the usual requirement to obtain a warrant before entering someone's home. The Court held that whether a particular misdemeanor pursuit justifies warrantless home entry depends on the specific facts: the nature of the crime, the nature of the flight, and whether a genuine emergency exists — such as imminent violence, destruction of evidence, or the suspect escaping from the home entirely.
The Court rejected a blanket rule that would treat every misdemeanor pursuit the same. Because misdemeanors range from violent assaults to trivial offenses like littering or making noise, police chasing a minor offender may often have time to get a warrant. When there is no real emergency, officers must get one. Because the California court had applied the forbidden categorical rule, the case was sent back for a fact-specific analysis of Lange's situation.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Police officers nationwide must now weigh the specific circumstances — the seriousness of the offense, the risk of evidence destruction, danger to others, and likelihood of escape — before entering a misdemeanor suspect's home without a warrant. The mere fact that a suspect fled is no longer enough on its own. Officers responding to minor infractions, traffic stops, and other misdemeanor situations that end with a suspect retreating home must now pause and assess.
What changes now
The California Court of Appeal's judgment was vacated and the case sent back to California courts to determine whether the specific facts of Lange's situation — his short flight of about one hundred feet, the nature of his offense, and the officer's observations — actually created an exigency justifying warrantless entry into his garage. If the lower courts find no exigency, the evidence gathered inside may be suppressed.
What this does not decide
The Court did not decide whether the specific entry into Lange's garage was lawful — that question returns to California courts. The ruling also does not address whether evidence must be suppressed when an officer enters a home during a misdemeanor pursuit without a qualifying exigency; Justice Thomas argued separately that the exclusionary rule would not apply even in that scenario.
Concurrences and dissents
Concurrence in part — Justice Thomas
Justice Thomas joined all of the majority opinion except Part II-A, which analyzed the Court's own precedents, and wrote separately on two points. First, he cautioned that the majority's general case-by-case rule does not foreclose historical categorical exceptions — including warrantless entries to recapture escaped arrestees, to stop affrays, and to address certain offenses likely to escalate to serious harm — whose contours the majority intentionally left open. Second, he argued that even if a warrantless entry violates the Fourth Amendment, the exclusionary rule should not apply in hot-pursuit cases, because suppressing evidence would reward suspects who flee rather than deter clearly unlawful police conduct. Justice Kavanaugh joined this second point.
Concurrence — Justice Kavanaugh
Justice Kavanaugh joined the majority opinion and wrote separately to underscore that the practical difference between the majority's case-by-case approach and Chief Justice Roberts' categorical rule will be minimal in most cases. He observed that nearly every misdemeanor pursuit will also involve a recognized exigency — risk of escape, destruction of evidence, or harm to others — making warrantless entry lawful regardless; even Lange's own attorney acknowledged the majority's rule permits warrantless entry 'nine times out of ten or more.' He also joined Part II of Justice Thomas's opinion on the exclusionary rule.
Concurrence — Justice Roberts
Chief Justice Roberts, joined by Justice Alito, agreed the lower court's blanket rule was flawed in some respects but would have adopted a different categorical rule: hot pursuit is itself an exigent circumstance justifying warrantless home entry regardless of whether the underlying offense is a misdemeanor or felony. In his view, it is the act of flight — not the severity of the underlying crime — that creates the emergency. He criticized the majority's approach as unworkable, arguing officers in the field often cannot quickly classify an offense as a misdemeanor or felony and cannot reliably assess other exigencies while actively in pursuit.
How the Court got there
The legal reasoning, step by step
- The Fourth Amendment's default rule requires police to obtain a warrant before entering a home without permission. One recognized exception is 'exigent circumstances' — genuine emergencies where there is a compelling need for immediate action and no time to get a warrant, such as preventing imminent injury, stopping the destruction of evidence, or blocking a suspect's escape from the home.
- The Court has consistently applied the exigent-circumstances exception on a case-by-case basis, looking at the totality of the circumstances the officer faced. It has never treated an entire category of situation as automatically constituting an exigency without examining the particular facts on the ground.
- The Court considered whether its 1976 ruling in *United States v. Santana* — which upheld warrantless entry during a 'hot pursuit' of a drug-dealing suspect — established a categorical rule covering all pursuits, felony or misdemeanor. It concluded that Santana involved only a fleeing felon and left the misdemeanor question explicitly open, as the Court itself had confirmed in *Stanton v. Sims* (2013).
- Misdemeanors cover an enormous range of conduct — from violent assaults to littering on a public beach or artificially coloring live chicks. Earlier precedent (*Welsh v. Wisconsin*, 1984) recognized that minor offenses generally do not create an emergency justifying warrantless home entry. Adding a suspect's flight shifts the calculus, but not enough for a blanket rule: some misdemeanor pursuits involve real dangers, but many do not, and a rule treating them all identically sweeps too broadly.
- The common law at the Constitution's founding supported the same conclusion: while constables had a categorical rule permitting warrantless entry in pursuit of fleeing felons, misdemeanor cases required attention to specific circumstances — whether serious harm was imminent, whether violence threatened — rather than a flat rule applicable to every misdemeanor flight.
- Combining modern precedents and historical practice, the Court held that officers must assess all relevant facts to determine whether an actual emergency exists when chasing a misdemeanor suspect. If the circumstances show an emergency — imminent harm, destruction of evidence, or escape from the home — they may enter without a warrant. If not, they must get one.
Doctrinal impact
Cases affected by this decision
Distinguishes United States v. Santana (427 U.S. 38)
Santana addressed only a fleeing felony suspect and established no categorical rule for misdemeanor pursuits.
Reaffirms Welsh v. Wisconsin (466 U.S. 740)
Welsh's principle that minor offenses generally do not create the exigency needed for warrantless home entry was affirmed and extended.