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Encyclopedia entry

Penal Code 837 (Private Person's Arrest)

Defines the narrow circumstances under which a private citizen, including a security officer, may lawfully detain someone for a crime.

Penal Code section 837 authorizes a private person to arrest another for a public offense committed or attempted in their presence, for a felony actually committed even if not in their presence (where they have reasonable cause to believe the person committed it), or when a felony has in fact been committed and they have reasonable cause to believe the person arrested committed it. It is the statutory foundation for what security officers commonly call a 'citizen's arrest.'

This authority is exercised daily on retail and apartment properties when loss-prevention or patrol officers detain a shoplifting suspect or trespasser pending police arrival. Because officers are not peace officers, the standard is stricter than what a sworn officer may rely on, and mistakes in applying it can expose the officer and employer to false-imprisonment or false-arrest liability.

Officers exercising this authority must use only reasonable force to effect and maintain the detention, must deliver the person to a peace officer or magistrate without unnecessary delay under PC 847, and should never detain based on mere suspicion untethered to observed facts. Training should walk through concrete fact patterns rather than treating this as a blanket authorization to seize anyone believed to be dishonest.

Citizen's arrest law involves significant liability exposure and nuanced case law; verify current statutory text and obtain counsel review of any related company policy.

Related entries

Citizen's Arrest (Private Person's Arrest)The narrow authority under California Penal Code 837 for any private person, including a security officer, to detain someone for certain offenses.Penal Code 838/839 (Arrest Procedure and Force to Effect It)Companion statutes to PC 837 describing how an arrest must be communicated and the limited force allowed to make or hold it.Use of Force (Private Security Standard)The general reasonable-force standard that governs a private security officer, distinct from any police use-of-force policy.Retail Theft (Shoplifting)Theft of merchandise from a retail store, addressed through deterrence, observation, and documented incident response.

Official sources

  1. [1]Cal. Penal Code § 837California Legislative Information

Links point to the publishing agency or the California Legislative Information text. Government pages are reorganized periodically — if a link moves, search the code section or agency name at the official site.

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General industry and regulatory usage — not legal advice, and not an endorsement by BSIS, the Department of Consumer Affairs, or any law-enforcement agency. Statutes, regulations, and local ordinances change; verify current text at the official government source or with your attorney.

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