Whether the Fourth Amendment requires police to obtain a search warrant before conducting a limited protective sweep while making a lawful in-home arrest.
Holding
No. A warrant is not required for a properly limited protective sweep conducted incident to a lawful in-home arrest to protect officers and others at the scene.
Reasoning
The arrest warrant, together with probable cause to believe Buie was at home, authorized the officers to enter the residence and search places where Buie might be found, including the basement. Once they found and arrested him, that authority to search for Buie ended, but the officers still faced a distinct safety risk from other people who might be concealed in the house.
The Court treated the sweep as a safety measure analogous to the frisk upheld in Terry v. Ohio and the vehicle frisk upheld in Michigan v. Long. An in-home arrest can be especially dangerous because officers are on unfamiliar terrain and may be vulnerable to an ambush by unseen third parties. That immediate safety interest can justify a narrow, warrantless intrusion even though the home ordinarily receives the Fourth Amendment’s strongest protection.
The sweep is not a general evidentiary search. It must be a quick, cursory visual inspection of spaces where a person could hide, and it may last only as long as necessary to dispel the danger and, in all events, no longer than completion of the arrest and departure from the premises. Evidence observed in plain view during a lawful sweep may be seized if its incriminating character is supported by probable cause.