Private Person’s Arrest

What you should be able to do

• Identify the three broad Penal Code section 837 arrest conditions.
• Explain why a guard is not required to make a private person’s arrest.
• Distinguish reasonable cause for a felony from personally witnessing a public offense.
• Describe safe notification and transfer to law enforcement.

Arrest authority is limited—and using it is a choice

Security officers generally rely on private-person arrest authority, not police authority. Even when a legal condition may exist, the guard is not automatically required to arrest. Consider safety, post orders, available evidence, backup, the seriousness of the conduct, and whether observing and reporting is the better lawful option.

The three broad conditions

California Penal Code section 837 describes three situations: a public offense committed or attempted in the private person’s presence; the person arrested has committed a felony, although not in the arresting person’s presence; or a felony has in fact been committed and the arresting person has reasonable cause to believe the person arrested committed it. The details matter. Study the official manual and provider instruction carefully.

Presence means personal sensory knowledge

For the “committed or attempted in your presence” condition, rely on what you personally perceived—not merely a rumor or a customer’s unsupported conclusion. Seeing, hearing, or otherwise directly sensing relevant conduct can matter. If you only receive a report, slow down and evaluate whether another lawful basis exists.

Communicate and transfer promptly

When making a private person’s arrest, clearly tell the person that they are under arrest and state the reason, unless circumstances make immediate explanation impossible. Do not turn the encounter into an interrogation. Call law enforcement and transfer custody without unnecessary delay.

False arrest risk

If the legal basis is missing, the wrong person is arrested, or the restraint becomes unreasonable, the guard and employer may face civil consequences and possibly criminal exposure. Good intentions do not replace a lawful basis. Accurate observations, measured decisions, and complete reporting are essential.

Common exam and job mistakes

• Believing a guard must arrest whenever a rule is broken.
• Using a customer’s accusation as if it were personal observation.
• Questioning a detained person for a confession.
• Delaying police notification after an arrest.