Can Security Guards Detain You? What the Law Actually Allows

Security guards can detain people, but only in narrow situations, and usually with no more power than any private citizen. Get it wrong and the guard, not the suspect, can end up facing a lawsuit or criminal charges. Here is what the law generally allows, using California as the example.

The legal basis: citizen’s arrest

In California, Penal Code 837 lets a private person — including a security guard — arrest someone only when:

1. The person committed or attempted a public offense in your presence;
2. The person committed a felony, even if not in your presence; or
3. A felony has actually been committed and you have reasonable cause to believe this person did it.

Notice what is missing: you cannot arrest someone for a misdemeanor you did not personally witness, and you cannot act on a hunch or on what someone else told you.

Shoplifting: the merchant’s privilege

California Penal Code 490.5(f) gives merchants and their employees or agents — which usually includes store security — a limited right to detain a suspected shoplifter:

• You need probable cause that the person is taking or trying to take merchandise.
• The detention must be reasonable in manner and length — just long enough to investigate or wait for police.
• You may ask for the person’s name and address and try to recover the item.
• Only reasonable, non-deadly force is allowed to prevent escape or protect people or property.
• You may not search the person beyond what the law allows. Let police handle searches.

The shoplifting stop: steps loss prevention follows

Most retailers and loss prevention teams won’t approve a stop unless the officer personally saw every one of these steps. They are industry best practice, not the law itself — California only requires probable cause — but they are what keeps a stop from becoming a false arrest:

1. You saw the person approach the merchandise.
2. You saw them select it.
3. You saw them conceal, carry away or convert it.
4. You kept them under continuous observation — no gaps.
5. You saw them pass the last point of sale without paying.
6. You approach them outside (or past the last point of sale), calmly and with a witness if possible.

Legally, a merchant detention under Penal Code 490.5 is a detention to investigate, not an arrest. But BSIS training is clear: a guard’s power to arrest is no greater than any private citizen’s, and a guard who arrests without the legal basis can be sued and even charged.

Common mistakes that get guards in trouble

• Detaining someone based on another employee’s word without seeing anything yourself.
• Chasing a suspect off the property or into traffic.
• Using more force than needed, or using force after the person stops resisting.
• Holding someone for a long time without calling police.
• Searching bags or pockets on your own authority.
• Not writing a detailed report immediately afterward.

Best practice on post

1. Know your employer’s policy. Many companies forbid physical detention entirely, even when the law would allow it.
2. Observe and document first: what you saw, when, and who was there.
3. If you do detain, say clearly that you are holding them for police, and call 911.
4. Use the least force possible and keep everyone safe.
5. Write your incident report right away, while details are fresh.

What to say during a detention

1. Identify yourself: “I’m with store security.” Show your credentials if asked.
2. State the reason calmly and privately: “I need to talk to you about the items in your bag that weren’t paid for.”
3. Ask them to come with you to a private office, ideally with a witness of the same gender present.
4. Don’t accuse loudly, insult or threaten. Keep it factual.
5. Tell them what happens next: “We are waiting for the police.”

If the person runs or fights

Let them go. No merchandise is worth a chase into traffic, a fight in a parking lot, or a weapon pulled on you. Most employers require you to disengage once a stop turns physical or the person flees. Instead, note their description, direction of travel and any vehicle and plate, call police, save the video, and write it up. A well-documented case can still lead to an arrest later.

Handing the person over to police

• Keep the person in a safe, private area until officers arrive.
• Don’t search them — let police do it.
• Give officers your account, the recovered items and the video details.
• Get the officer’s name, badge number and report number for your report.
• If police won’t respond, follow company policy — often you must let the person leave after recovering the merchandise and documenting everything.

Juveniles and vulnerable people

Be especially careful with minors, elderly people and anyone who appears confused or in crisis. Many companies have specific rules — such as contacting a parent or guardian, or not detaining minors at all. Keep detentions as short as possible, keep a witness present, and lean toward letting police or medical staff take over.

Company policy vs. the law

The law sets the outer limit of what you’re allowed to do. Your employer’s policy is usually much stricter, and it is the one that decides whether you keep your job. Many retailers forbid physical stops entirely, require a manager’s approval, or allow stops only by trained loss prevention staff. If the two ever conflict, follow the stricter one.

Writing up a detention

Every detention should be followed by a detailed report, written before the end of your shift. Include each step you observed (selection, concealment, continuous observation, passing the last point of sale), exactly what you said when you approached, how the person responded, any force used and why, who witnessed it, when police were called and arrived, and the outcome. If anything goes wrong later, this report is what protects you. See our incident report guide for a full template.