AR Security Guard study materials
AR Security Guard study resources

AR Security Guard key terms

AR Security Guard · Get comfortable with the vocabulary.

Citizen's Arrest

A limited power under which a private person may detain someone who has just committed a felony or a breach of the peace in their presence, requiring prompt delivery to law enforcement.

Related: Detention, Probable Cause
Private Security Authority

The legal power a guard holds as an agent of a property owner or employer rather than as a sworn officer, limited to the property and purposes the client grants.

Related: Scope of Employment, Citizen's Arrest
Scope of Employment

The range of duties and locations a guard is authorized to act within while on duty; actions outside it may create personal liability and lose employer protection.

Related: Private Security Authority, Negligent Hiring
Trespass

Entering or remaining on property without permission or legal right; guards may ask unauthorized persons to leave and may use reasonable means to enforce that request.

Related: Premises Liability, Detention
False Imprisonment

Intentionally confining a person without lawful authority or consent, such as detaining someone without adequate grounds; a major civil and criminal risk for guards.

Related: Detention, Probable Cause
Detention

A brief, lawful holding of a person based on reasonable suspicion or observed wrongdoing, limited in time and scope to confirming or resolving the suspicion.

Related: Reasonable Suspicion, False Imprisonment
Reasonable Suspicion

An objective basis, supported by specific observable facts, for believing a person has committed or is about to commit wrongdoing; a lower standard than probable cause.

Related: Probable Cause, Detention
Probable Cause

Facts and circumstances that would lead a reasonable person to believe a crime has occurred and that a particular person committed it; required for arrest-level action.

Related: Reasonable Suspicion, Citizen's Arrest
Use of Force Continuum

A graduated framework matching the level of resistance encountered to an appropriate, proportionate response, from presence and verbal direction up to physical control.

Related: Reasonable Force, Deadly Force
Reasonable Force

The minimum amount of physical effort necessary to accomplish a lawful purpose such as self-defense or preventing harm, judged by what a reasonable person would do.

Related: Use of Force Continuum, Deadly Force
Deadly Force

Force intended or likely to cause death or serious bodily injury; permitted only in narrow circumstances such as imminent threat of death or serious harm to self or others.

Related: Reasonable Force, Use of Force Continuum
Duty to Retreat

The legal expectation, where it applies, that a person step back from a confrontation when safely possible before using force; rules vary by jurisdiction and setting.

Related: Self-Defense, Reasonable Force
Self-Defense

The lawful use of proportionate force to protect oneself from an imminent threat of harm, ending once the threat has stopped.

Related: Duty to Retreat, Reasonable Force
Handcuffing

Applying restraints to control a person lawfully detained or arrested; requires justification, proper technique, and attention to the person's safety and dignity.

Related: Detention, Use of Force Continuum
Search

An examination of a person, vehicle, or property for evidence or contraband; private guards generally act only with consent, contractual authority, or legal exception.

Related: Consent Search, Trespass
Consent Search

A search permitted because a person freely and knowingly agrees to it; consent must be voluntary, may be limited in scope, and can be withdrawn at any time.

Related: Search, Trespass
Patrol

Systematic movement through an assigned area on foot or by vehicle to deter crime, observe conditions, and respond to incidents according to a defined pattern.

Related: Post Orders, Perimeter Check
Post Orders

Written instructions from the client or employer describing a guard's specific duties, authority, patrol routes, and reporting requirements at a given location.

Related: Patrol, Daily Activity Report
Perimeter Check

An inspection of the outer boundary of a protected area, looking for breaches, damage, unauthorized entry points, and suspicious activity.

Related: Patrol, Access Control
Access Control

The process of regulating who may enter or leave a site, using identification checks, badges, logs, or barriers to prevent unauthorized entry.

Related: Perimeter Check, Visitor Log
Observation

Deliberate, focused attention to people, objects, and conditions using sight, sound, and other senses to gather accurate facts for reporting.

Related: Report Writing, Descriptive Detail
Report Writing

Recording incidents and observations in clear, factual, chronological form, distinguishing observed facts from opinions and avoiding speculation.

Related: Observation, Daily Activity Report
Daily Activity Report

A routine log completed each shift summarizing patrols, incidents, contacts, and unusual conditions, providing a record for the client and employer.

Related: Report Writing, Post Orders
Chain of Custody

A documented, unbroken record of who handled evidence, when, and where, from collection through transfer, preserving its integrity for legal proceedings.

Related: Evidence Preservation, Report Writing
Evidence Preservation

Protecting physical items, recordings, and documentation from loss, alteration, or contamination so they remain reliable for investigation or court.

Related: Chain of Custody, Report Writing
Descriptive Detail

Specific, observable characteristics of a person, vehicle, or scene, such as height, clothing, marks, or direction of travel, that aid identification and reporting.

Related: Observation, Report Writing
Emergency Action Plan

A prearranged set of procedures telling occupants and staff what to do during fire, medical, weather, or security emergencies, including evacuation and assembly points.

Related: Evacuation, Incident Command
Evacuation

The orderly movement of people out of a threatened area to a safe location, guided by clear routes, exit use, and designated assembly points.

Related: Emergency Action Plan, Assembly Point
Assembly Point

A predetermined safe location where evacuated people gather so they can be accounted for and kept clear of hazards and emergency operations.

Related: Evacuation, Emergency Action Plan
Incident Command

A structured system assigning clear roles for command, operations, and communication during an emergency so responders act in a coordinated way.

Related: Emergency Action Plan, Scene Preservation
Scene Preservation

Securing an incident area, limiting access, and avoiding disturbance of evidence until investigators or emergency services take control.

Related: Chain of Custody, Incident Command
First Aid

Immediate basic care given to an injured or ill person before professional medical help arrives, limited to the responder's training and certification.

Related: Emergency Action Plan, Incident Command
Professional Ethics

The standards of honesty, fairness, and integrity expected of a guard, including refusing bribes, avoiding conflicts of interest, and treating all people impartially.

Related: Code of Conduct, Public Trust
Code of Conduct

The written rules governing a guard's behavior on duty, covering appearance, punctuality, reporting, use of authority, and prohibited actions.

Related: Professional Ethics, Public Trust
Public Trust

The confidence the community places in a guard's role, which depends on consistent fairness, restraint, and lawful conduct and is easily damaged by misconduct.

Related: Professional Ethics, Community Relations
Community Relations

The way a guard interacts with the public, tenants, and visitors, where courtesy, clear communication, and calm demeanor build cooperation and reduce conflict.

Related: Public Trust, De-escalation
De-escalation

Techniques such as calm speech, active listening, distance, and slowing the interaction that reduce tension and avoid the need for physical force.

Related: Community Relations, Use of Force Continuum
Conflict of Interest

A situation where a guard's personal interests, relationships, or side dealings could improperly influence their duties; it must be disclosed and avoided.

Related: Professional Ethics, Code of Conduct
Negligent Hiring

A legal claim that an employer failed to reasonably screen or train a guard, leading to harm; it underscores the importance of background checks and proper training.

Related: Scope of Employment, Premises Liability
Premises Liability

The legal responsibility of property owners and their agents to keep the site reasonably safe and warn of known hazards; guards often help meet this duty.

Related: Trespass, Negligent Hiring