Constitutional Law
Fourth Amendment
The constitutional protection against unreasonable searches and seizures.
Plain-English definition
The Fourth Amendment governs police searches, arrests, traffic stops, warrants, home entries, phones, data, and many encounters with law enforcement. The core question is usually whether a search or seizure was reasonable under the circumstances.
How it works
Fourth Amendment issues appear in suppression motions, civil-rights cases, warrant challenges, excessive-force claims, and qualified-immunity disputes.
Why it matters
Fourth Amendment rulings can suppress evidence in criminal cases and create damages exposure in civil cases.
Related terms
Qualified Immunity
A defense shielding government officials from damages unless they violated clearly established federal law.
Search Warrant
A judge’s authorization for law enforcement to search a specified place or thing for specified evidence.
Suppression Motion
A defense motion asking the court to exclude evidence obtained in violation of constitutional or statutory rules.
More in Constitutional Law
Due Process
A constitutional guarantee that government must use fair procedures and respect certain protected rights before depriving life, liberty, or property.
Equal Protection
The constitutional principle that government must treat similarly situated people alike unless it has a sufficient justification.
Qualified Immunity
A defense shielding government officials from damages unless they violated clearly established federal law.
Section 1983
The federal statute allowing lawsuits against state or local actors for constitutional and federal-rights violations.
Standing
The constitutional requirement that a plaintiff have a sufficient personal stake in the controversy to invoke federal court jurisdiction.
State Action
The requirement that many constitutional claims involve government action rather than purely private conduct.
Not legal advice. Definitions are for general reference. Consult an attorney before relying on any term in a real case.