A tort and, in many jurisdictions, a criminal offense consisting of the intentional confinement or restraint of a person without legal authority or the person's valid consent, by physical force, threat, or other direct restriction of liberty.

Principle

Intentional deprivation of an individual's freedom of movement without lawful justification creates civil liability and may constitute a crime because the right to bodily liberty is legally protected against unauthorized restraint.

Demonstration

Illustrative scenario — Situation: Store security detains a shopper for 45 minutes after an unproven theft suspicion and refuses to allow the shopper to leave. Recognition: The detained person asserts there was no lawful basis and did not consent. Action: The person sues for false imprisonment (or files a criminal complaint). Consequence: If the restraint lacked legal justification or consent, a civil remedy (damages) or criminal sanction may follow.

Misapplication

Treating brief, consensual delays or reasonable investigative stops with lawful basis as false imprisonment. Error: Confusing lawful authority (e.g., valid arrest or a consensual temporary hold) with unlawful restraint; the semantic error is failing to assess authority and consent.

Consequence

Established false imprisonment can produce civil awards for harm (including emotional distress), injunctive relief, and in some systems criminal penalties; it can also create reputational and regulatory consequences for institutions or agents involved.

Reversal

Not every restriction of movement is false imprisonment—lawful arrests, statutorily authorized detentions, valid citizen's arrests where permitted, or a person's informed consent negate the claim. Reasonable duration and scope for a justified detention also affect applicability.

Boundary

Clearly within: Forcing a person into a room and locking the door without lawful authority. Boundary case: A security guard asks a person to wait briefly pending verification—whether this is false imprisonment depends on consent, reasonableness, and legal authority. Clearly outside: A lawful arrest supported by probable cause and executed under statutory procedures.

Semantic Tension

Individual liberty ↔ Public‑order and security concerns (including loss-prevention and law enforcement duties); protecting movement rights can limit proactive security practices, while permitting broad detention powers risks abuse.

Synthesis

False imprisonment law operationalizes the boundary between permissible, authority‑based restraints (including those protecting public safety) and unlawful deprivations of liberty, emphasizing consent, legal authority, and reasonableness as the decisive criteria.