Amendment 4 · Ratified December 15, 1791
Explore the warrant requirement of the 4th Amendment, which protects individuals against unreasonable searches and seizures.
Source: U.S. Const. amend. 4
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
The 4th Amendment protects citizens from illegal searches and seizures by the government, requiring that warrants only be issued based on probable cause. This means that law enforcement must have concrete reasons to believe a search or seizure is necessary to obtain evidence of a crime.
The 4th Amendment was influenced by colonial experiences with British search practices, which often involved general warrants that allowed for arbitrary searches. These historical grievances highlighted the need for a constitutional safeguard against government overreach.
Probable cause is the standard that law enforcement must meet to obtain a warrant, indicating that there is a reasonable basis to believe a crime has been committed.
The exclusionary rule prohibits the use of evidence obtained through violations of the 4th Amendment in criminal prosecutions.
Holding: The Supreme Court ruled that evidence obtained in violation of the 4th Amendment cannot be used in state courts.
Significance: This decision extended the exclusionary rule to state courts, reinforcing the protection against unreasonable searches and seizures across the United States.
Holding: The Court determined that a warrant is required to search a public phone booth, affirming the notion of privacy in public spaces.
Significance: This case expanded the interpretation of the 4th Amendment to include protection of personal privacy, not just physical property.