Security guards in California are not police officers. They do not have peace officer authority, they cannot investigate crimes, and they cannot arrest you based on a hunch. What a security guard can do is make a citizen’s arrest under the same rules that apply to any private citizen. That power comes from California Penal Code 837, and it carries real legal limits that most people (and some guards) misunderstand.
This guide breaks down exactly when a California security guard can arrest you, what the law actually says, where the line sits between “detain” and “arrest,” and what happens when a guard gets it wrong. Business owners, property managers, and anyone who has ever interacted with a security guard should walk away knowing the rules.
Can a Security Guard Detain You in California?
Yes, a security guard in California can detain you, but only under specific conditions. A guard may briefly hold a person if they personally witness a crime, if they have reasonable cause to believe the person committed a felony, or if the person refuses to leave private property after being asked. Detention must be short, reasonable in scope, and followed by an immediate handoff to law enforcement.
People often use “arrest” and “detain” interchangeably, and the difference matters a lot in California law:
- Detention means temporarily holding a person while police are called. It is shorter, less formal, and used to preserve the scene until officers arrive.
- Arrest means taking a person into custody under legal authority. For a security guard, that authority is the citizen’s arrest power under Penal Code 837.
In practice, most “security guard arrests” are really detentions that end when police arrive and take over. Courts have consistently held that detentions lasting more than 20 to 30 minutes without police notification can shift from lawful to unlawful, which exposes the guard, the security company, and the property owner to false imprisonment claims.
Security guards also have authority to ask trespassers to leave private property and to detain those who refuse. For a deeper look at that specific scenario, read how to remove a trespasser from your Los Angeles property.
What Does California Penal Code 837 Actually Say?
California Penal Code 837 is a short, direct law. It states that a private person may arrest another under three conditions:
- For a public offense committed or attempted in their presence
- When the person arrested has committed a felony, even if not in their presence
- When a felony has in fact been committed and the arrester has reasonable cause to believe the person did it
That is the entire framework. A security guard is treated as a private person under this statute, meaning a guard’s arrest authority is identical to any civilian’s. The guard does not get extra powers because of the uniform, the badge, or the license.
The first condition is the most common in security work. A guard who personally witnesses a shoplifter, a vandal, or someone assaulting another person can make a citizen’s arrest on the spot. The second and third conditions involve felonies and require “reasonable cause,” which is a higher standard that is easier to get wrong.
You can read the official statute directly at the California Legislative Information site for Penal Code 837.
What Is the Difference Between a Security Guard Arrest and a Police Arrest?
A police arrest is made under the authority of a peace officer, backed by state law and, in many cases, probable cause that extends beyond what a private citizen can act on. A security guard arrest is a citizen’s arrest, limited to what the guard personally witnesses or has direct evidence of. The two are not the same, and pretending they are is a crime in California.
Key differences between the two:
- Authority: Police hold peace officer authority under California law. Security guards hold only the citizen’s arrest authority of Penal Code 837.
- Probable cause: Police can arrest based on probable cause developed through investigation. Security guards generally must witness the crime directly or have evidence of a specific felony.
- Investigation power: Police can investigate, interview suspects, collect evidence, and pursue charges. Security guards observe, document, and report.
- Jurisdiction: Police have citywide, countywide, or statewide jurisdiction depending on their agency. Security guards have authority only on the property they are hired to protect.
- Impersonation: Security guards who represent themselves as police officers face criminal charges under California Penal Code 538d and can lose their BSIS license.
For the broader view of what California security guards are and are not allowed to do, see our full guide on what security guards can do in California.
Can a Security Guard Use Force to Arrest You in California?
Yes, but only a reasonable and necessary amount of force. California law allows a security guard making a lawful citizen’s arrest to use force in self-defense, to defend others, to overcome active resistance, or to prevent escape. Any force beyond what the situation actually requires is unlawful and can expose the guard, the security company, and the property owner to civil and criminal liability.
Here is how California courts have defined “reasonable force” in citizen’s arrest situations:
- Proportional to the threat: The force used must match the resistance offered. A compliant suspect cannot be tackled.
- Necessary for the arrest: Force is only justified if it is needed to make or maintain the arrest. Once the person is detained, force must stop.
- Never punitive: Guards cannot use force to punish, intimidate, or retaliate. Force is only for safety and compliance.
- Deadly force is almost never permitted: Security guards cannot use deadly force except in immediate self-defense against threatened death or serious bodily injury.
Handcuffs can be used during a citizen’s arrest if the guard is trained in proper restraint and the situation requires it. Guards cannot search you or your belongings without consent, even during an arrest. The guard’s job is to hold the scene until police arrive, not to investigate.
Excessive force claims are one of the most common sources of liability in private security, which is why reputable California companies require ongoing use-of-force training for every guard, not just armed officers.
Can a Security Guard Follow You Off the Property?
Generally no. A California security guard’s authority is tied to the property they are hired to protect. Pursuing a suspect off-property is almost never allowed and frequently creates serious legal exposure. The main exception is when the guard has a lawful citizen’s arrest already in progress and is maintaining custody until police arrive.
If a suspect flees the property, the right move is almost always to document what happened, provide a detailed description to law enforcement, and let the police handle the pursuit. Chases, car pursuits, and off-property confrontations almost always end badly, regardless of who was legally in the right to begin with.
What Happens if a Security Guard Arrests You Wrongfully?
A wrongful citizen’s arrest exposes the security guard, the security company, and often the property owner to civil lawsuits and criminal charges. Common claims after a wrongful arrest include false imprisonment, assault, battery, and civil rights violations. Businesses that hire undertrained or unlicensed guards face the same liability as the guard themselves.
The most common liability scenarios:
- False imprisonment: Detaining someone without legal grounds, even for a few minutes, can trigger a civil lawsuit under California law.
- Assault or battery: Using force beyond what the situation required can result in both criminal charges and civil damages.
- Racial profiling or discrimination: Detaining or arresting based on race, ethnicity, or other protected characteristics violates state and federal law.
- Employer liability: The security company (and sometimes the client) can be sued under respondeat superior, which holds employers responsible for their employees’ on-duty actions.
- BSIS consequences: Guards who abuse their authority can lose their BSIS license, ending their career in California security.
Damages in a wrongful arrest case can include compensatory awards for medical bills, lost wages, and emotional distress, plus punitive damages when the conduct was malicious or reckless. Settlements and judgments in the tens or hundreds of thousands of dollars are common.
The business lesson is simple. The cheapest security quote almost always costs the most when something goes wrong. Hiring a California security company that trains its guards on citizen’s arrest law, use of force, and de-escalation is not a luxury. It is risk management.
How Should a California Business Protect Itself?
Businesses that use security guards should vet their provider on training, licensing, insurance, and documentation. A well-trained guard who understands Penal Code 837, Penal Code 847, and California use-of-force rules protects both your property and your legal exposure. A poorly trained guard can turn a simple shoplifting incident into a seven-figure lawsuit.
Five questions every California business should ask before signing a security contract:
- How do you train guards on citizen’s arrest authority and use-of-force limits?
- What percentage of your guards have training beyond the BSIS minimum?
- What insurance coverage do you carry, including general liability and professional liability?
- How do you document every detention, arrest, or use-of-force incident?
- Do your trainers have law enforcement backgrounds, and do they provide ongoing refreshers?
Specific, documented answers are what separate professional security companies from the rest of the market.
Ready to Work With a Security Company That Trains Guards the Right Way?
Guardian National Security has protected properties across Los Angeles and Southern California since 1997. Every guard we deploy holds a valid California BSIS license, trains under retired law enforcement officers, and operates under Detex GPS tracking on every shift. Our training covers Penal Code 837, use-of-force rules, de-escalation, and incident documentation so our clients stay compliant and protected at the same time.
See our full security guard services, or contact Guardian National Security for a free consultation and price-matched quote.
