OH Security Guard study materials
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OH Security Guard key terms

OH Security Guard · Get comfortable with the vocabulary.

ORC Chapter 4749

Ohio statute chapter that governs licensing of private investigator and security guard providers and registration of security guards; it sets scope, application, identification, and disciplinary requirements.

Related: Private Investigator Security Guard Services (PISGS), Security guard provider, Registered security guard
Private Investigator Security Guard Services (PISGS)

Ohio Department of Public Safety office that licenses security guard providers, registers individual guards, issues credentials, investigates complaints, and enforces Chapter 4749 requirements.

Related: ORC Chapter 4749, Security guard provider, Registered security guard
Security guard provider

A person or business licensed under Ohio law to offer or perform security guard services for clients; must comply with Chapter 4749 and use registered guards as required.

Related: ORC Chapter 4749, Registered security guard, Post orders
Registered security guard

An individual who holds a current Ohio registration to perform security guard services through a licensed provider; registration does not confer police officer powers or authority.

Related: PISGS, Security guard provider, Use of force
Citizen's arrest

A private person's limited authority under Ohio law to arrest another for a felony when reasonable grounds exist and detain until a warrant can be obtained; not general police authority.

Related: Investigative detention, Probable cause
Investigative detention

A temporary seizure of a person based on reasonable suspicion of criminal activity, limited in scope and duration to confirming or dispelling the suspicion; guards must articulate specific facts.

Related: Reasonable suspicion, Citizen's arrest, False imprisonment
Probable cause

Facts and circumstances that would lead a reasonable person to believe a crime has been, is being, or will be committed, or that a person is involved; needed for arrest.

Related: Reasonable suspicion, Citizen's arrest
Reasonable suspicion

Specific, articulable facts plus rational inferences that a person may be involved in criminal activity; lower than probable cause and supports brief investigative detention.

Related: Investigative detention, Probable cause
Consent search

A search authorized by a person's voluntary agreement, limited to the scope and duration granted; consent may be refused or withdrawn and must not be obtained by coercion.

Related: Plain view, Trespass
Plain view

Doctrine allowing an officer or guard lawfully positioned to seize evidence or contraband whose incriminating character is immediately apparent without additional intrusion.

Related: Consent search, Chain of custody
Trespass

Unauthorized entry onto or remaining on another's property after notice or implied restriction; grounds for removal or police contact, not necessarily arrest by a guard.

Related: Access control, Premises liability
Premises liability

A property owner's or occupier's legal duty to maintain safe conditions and warn of known hazards; security failures can support civil claims.

Related: Negligence, Trespass
Use of force

Physical coercion used to gain compliance, protect persons, or prevent harm; must be justified, proportionate, and consistent with law, policy, and training.

Related: Reasonable force, Deadly force, De-escalation
Reasonable force

Force that an objectively reasonable person would judge necessary under the totality of circumstances, considering threat level, alternatives, and the subject's actions.

Related: Use of force, Deadly force, Less-lethal weapon
Deadly force

Force intended to cause, or that the actor knows creates a substantial risk of causing, death or serious bodily harm; justified only against an imminent threat of death or serious injury.

Related: Use of force, Reasonable force
Less-lethal weapon

A device such as OC spray, a baton, or an electronic control weapon designed to incapacitate or gain compliance with lower risk of death; requires training and policy limits.

Related: Use of force, Positional asphyxia
Positional asphyxia

Breathing failure caused by body position, often prone restraint or chest compression; signs include altered speech, labored breathing, and loss of consciousness, requiring immediate repositioning and medical aid.

Related: Less-lethal weapon, CPR
Cover versus concealment

Cover blocks incoming projectiles and protects from fire; concealment hides a person from view but may not stop rounds. Guards should distinguish both during threat response.

Related: Reactionary gap, Use of force
Reactionary gap

The distance a guard keeps from a potentially dangerous person to allow time and space to perceive and respond to a sudden attack; often around six to ten feet.

Related: Cover versus concealment, De-escalation
De-escalation

A deliberate process of reducing conflict intensity through communication, time, distance, positioning, and available resources while maintaining safety and lawful objectives.

Related: Tactical communication, Active listening, Use of force
Active listening

A communication skill involving focused attention, paraphrasing, clarifying, and reflecting feelings so the speaker feels heard and trust and cooperation improve.

Related: De-escalation, Tactical communication
Tactical communication

Structured verbal techniques using calm tone, clear commands, empathy, and options to gain voluntary compliance and reduce the need for force.

Related: De-escalation, Active listening
Incident report

A factual written record of an event that answers who, what, when, where, why, and how, and documents actions, observations, evidence, and notifications without opinion or speculation.

Related: Chain of custody, Observation
Chain of custody

A chronological documented record of who handled evidence, when, where, and why, used to preserve integrity and admissibility from collection through disposition.

Related: Incident report, Plain view
Observation

The purposeful use of senses and systematic scanning to notice people, objects, conditions, and changes; effective observation includes description, comparison, and recording of details.

Related: Incident report, CCTV
Access control

The process of limiting entry to an area to authorized people, vehicles, or items through credentials, barriers, escort rules, and monitoring.

Related: Visitor log, Perimeter security, Trespass
Visitor log

A record of visitors' names, times, destinations, and hosts used to account for people on site and support investigations or evacuations.

Related: Access control, Emergency action plan
Perimeter security

Protection of the outer boundary of a site using barriers, lighting, patrols, sensors, and access points to deter or detect unauthorized entry.

Related: Access control, CCTV, Alarm response
CCTV

Closed-circuit television: cameras and recording systems used to monitor and document activity; operators must follow privacy, retention, and evidence-handling policies.

Related: Observation, Perimeter security, Access control
Alarm response

Procedures for verifying, investigating, and documenting an alarm activation, including safe approach, scene assessment, police notification, and reset or escalation.

Related: Emergency action plan, Incident Command System, Perimeter security
Emergency action plan

A site-specific document assigning roles and describing response, evacuation, sheltering, communication, and recovery procedures for foreseeable emergencies at that location.

Related: Alarm response, Incident Command System, Visitor log
Incident Command System

A standardized management structure using clear common roles, terminology, objectives, and span of control to coordinate multi-agency emergency incident response.

Related: Emergency action plan, Alarm response
CPR

Cardiopulmonary resuscitation: chest compressions, with rescue breaths if trained, used to circulate blood when a person is unresponsive and not breathing normally until advanced care arrives.

Related: AED, Positional asphyxia
AED

Automated external defibrillator: a portable device that analyzes heart rhythm and delivers a shock for certain cardiac arrest rhythms; use as soon as available with CPR.

Related: CPR, Bloodborne pathogens
Bloodborne pathogens

Microorganisms such as hepatitis B, hepatitis C, and HIV spread through blood or body fluids; require exposure control, protective equipment, and reporting after exposure.

Related: CPR, AED
Negligence

A civil claim requiring a duty, breach of that duty, causation, and damages; security providers may be liable for unreasonable acts or failures.

Related: Premises liability, False imprisonment
False imprisonment

Intentional confinement of a person within boundaries without lawful justification or consent; a risk when detentions exceed legal authority or reasonable duration.

Related: Investigative detention, Negligence
Ethics

Principles guiding upright conduct, including honesty, fairness, confidentiality, and respect for rights; ethical choices protect public trust and reduce liability.

Related: Negligence, False imprisonment
Radio discipline

Using shared radio channels briefly, clearly, and with standard phrases; always prioritize urgent traffic, avoid speculation, and protect sensitive information.

Related: Tactical communication, Incident Command System
Post orders

Site-specific written instructions describing a guard's duties, patrol routes, access rules, emergency contacts, and reporting requirements for a particular assignment.

Related: Access control, Incident report, Alarm response