PA Act 120 MPOETC key terms
PA Act 120 MPOETC · Get comfortable with the vocabulary.
- Probable Cause
- Related: Reasonable Suspicion, Search Warrant, Arrest Warrant
Facts and circumstances that would lead a reasonable officer to believe a crime has been, is being, or will be committed, and that a particular person or place is connected to it.
- Reasonable Suspicion
- Related: Investigative Detention (Terry Stop), Probable Cause
Specific, articulable facts, not a mere hunch or instinct, that criminal activity may be occurring and that the person stopped is connected to it. It is the standard for an investigative detention.
- Arrest Warrant
- Related: Probable Cause, Search Warrant
A written order signed by a judge or magisterial district judge directing officers to take a named person into custody. It must be supported by probable cause and be properly served.
- Search Warrant
- Related: Probable Cause, Exigent Circumstances, Consent Search
A court order, based on probable cause, authorizing officers to search a specific person, place, or vehicle for specific items. It must particularly describe the place to be searched and the things to be seized.
- Exigent Circumstances
- Related: Search Warrant, Plain View Doctrine
Urgent conditions such as hot pursuit, imminent destruction of evidence, or danger to life that make waiting for a warrant unreasonable and permit immediate police action.
- Plain View Doctrine
- Related: Exigent Circumstances, Search Incident to Lawful Arrest
Permission to seize items without a warrant when officers are lawfully present, the item is in open view, and its incriminating character is immediately apparent.
- Consent Search
- Related: Search Warrant, Plain View Doctrine
A warrantless search allowed when a person with authority over the place or property gives voluntary, unambiguous permission. That person may limit the scope of the search or withdraw consent at any time.
- Search Incident to Lawful Arrest
- Related: Plain View Doctrine, Handcuffing and Control Holds
A warrantless search of an arrestee's person and the area within immediate reach, justified by officer safety and the need to prevent destruction of evidence.
- Miranda Warnings
- Related: Custodial Interrogation, Investigative Detention (Terry Stop)
Advisements required before custodial interrogation: the right to remain silent, that anything said can be used in court, the right to counsel, and appointed counsel for those who cannot afford one.
- Custodial Interrogation
- Related: Miranda Warnings, Investigative Detention (Terry Stop)
Police questioning, or words or actions reasonably likely to elicit an incriminating response, that occurs after a person has been arrested or otherwise deprived of freedom in a significant way.
- Investigative Detention (Terry Stop)
- Related: Reasonable Suspicion, Custodial Interrogation
A brief seizure based on reasonable suspicion during which officers may identify the person, ask questions, and pat down outer clothing if they suspect the person is armed and dangerous.
- Fruit of the Poisonous Tree
- Related: Search Warrant, Consent Search
Evidence obtained through an unconstitutional search or seizure that is generally excluded from trial unless an exception, such as inevitable discovery or attenuation, applies.
- Protection From Abuse (PFA) Order
- Related: Probable Cause, Arrest Warrant
A civil court order under Pennsylvania law directing an abuser to stay away from and have no contact with a family or household member; officers enforce the order and act on violations.
- Vehicle Pursuit
- Related: High-Risk Traffic Stop, Radio Discipline
An active attempt by an officer driving a patrol vehicle to apprehend a fleeing suspect who is aware of the attempt and resisting apprehension by fleeing. It requires continuous risk assessment under department policy.
- High-Risk Traffic Stop
- Related: Vehicle Pursuit, Handcuffing and Control Holds
A stop of a vehicle whose occupants are believed to be armed or dangerous, conducted with multiple units, cover, and felony-stop procedures instead of routine contact.
- Active Threat Response
- Related: Building Clearing, Deadly Force
The immediate response to an ongoing attack causing death or serious injury: officers move toward the threat, locate and stop the attacker, then render aid, without waiting for specialized units.
- Building Clearing
- Related: Active Threat Response, Radio Discipline
A coordinated, systematic movement through a structure to locate a suspect or victim, using cover, concealment, team communication, and controlled angles.
- Radio Discipline
- Related: Vehicle Pursuit, Building Clearing
Concise, standard transmissions using proper unit identification and clear speech so dispatch and other units can copy critical information correctly the first time.
- Chain of Custody
- Related: Evidence Packaging, Crime Scene Preservation
The documented, unbroken record of every person who handled an item of evidence, and when and why, from collection through court, showing that the item is authentic and unaltered.
- Crime Scene Preservation
- Related: Photographic Documentation, Chain of Custody
Protecting a scene by setting a perimeter, controlling access, keeping an entry log, and preventing contamination so that evidence is documented in its original condition.
- Evidence Packaging
- Related: Chain of Custody, Crime Scene Preservation
Sealing each item in an appropriate container and labeling it with case number, item number, date, and collector to prevent loss, cross-contamination, or degradation.
- Photographic Documentation
- Related: Crime Scene Preservation, Evidence Packaging
Recording a scene before anything is moved, using overall, mid-range, and close-up photographs with a scale, so the images accurately show the location and condition of evidence.
- Show-Up Identification
- Related: Investigative Detention (Terry Stop), Incident Report
Presentation of a single detained suspect to a witness soon after a crime. It is inherently suggestive and is admissible only when necessary and not conducted in an unnecessarily suggestive way.
- Incident Report
- Related: Chain of Custody, Show-Up Identification
A factual written record of an officer's involvement in an event, in chronological order, including names, times, observations, and actions taken; it may later be used in court.
- Objectively Reasonable Force
- Related: Use of Force Continuum, Deadly Force, De-escalation
Force measured from the perspective of a reasonable officer on the scene, weighing the severity of the crime, the immediate threat, and whether the subject was resisting or fleeing.
- Use of Force Continuum
- Related: Objectively Reasonable Force, De-escalation
A framework matching officer response levels, such as presence, verbal direction, control techniques, intermediate weapons, and deadly force, to the subject's behavior, allowing escalation or de-escalation.
- Deadly Force
- Related: Objectively Reasonable Force, Active Threat Response
Force that the officer knows or should know creates a substantial risk of death or serious bodily injury. It is justified only to prevent an imminent threat of death or serious injury to the officer or another person.
- De-escalation
- Related: Use of Force Continuum, Objectively Reasonable Force
Using time, distance, cover, containment, and communication to reduce the intensity of an encounter so that force is avoided or minimized when it is safe to do so.
- Handcuffing and Control Holds
- Related: Search Incident to Lawful Arrest, Objectively Reasonable Force
Restraint and physical techniques used to gain and maintain lawful control of a resisting subject, applied with the minimum force needed and adjusted if the subject stops resisting.
- Procedural Justice
- Related: Community Policing, Law Enforcement Code of Ethics
Treating people with dignity and respect, giving them a voice, making neutral decisions, and communicating trustworthy motives, which encourages voluntary compliance with the law.
- Bias-Based Profiling
- Related: Procedural Justice, Law Enforcement Code of Ethics
Making enforcement decisions based on race, ethnicity, national origin, gender, religion, or sexual orientation rather than on behavior or reliable information about an individual.
- Duty to Intervene
- Related: Objectively Reasonable Force, Law Enforcement Code of Ethics
An officer's obligation to stop another officer's excessive force or clear misconduct when in a position to do so, and to report that conduct to a supervisor.
- Community Policing
- Related: Procedural Justice, Incident Report
A strategy in which officers build ongoing partnerships with residents and organizations to identify problems and solve them together, rather than only responding to calls for service.
- Law Enforcement Code of Ethics
- Related: Procedural Justice, Duty to Intervene
A statement of core values, including integrity, honesty, respect for constitutional rights, and service to the public, that sets the standard of conduct expected of officers on and off duty.
- Physical Fitness Standards
- Related: Critical Incident Stress, Peer Support
The job-related fitness levels in areas such as aerobic capacity, strength, and flexibility that a police recruit must meet for certification and that officers are expected to maintain throughout their careers.
- Critical Incident Stress
- Related: Peer Support, Physical Fitness Standards
Normal physical and emotional reactions, such as fatigue, intrusive thoughts, anger, or sleep problems, that can follow a traumatic event and are managed through peer support, debriefing, and professional care.
- Peer Support
- Related: Critical Incident Stress, Law Enforcement Code of Ethics
A support program in which trained officers confidentially help colleagues cope with job-related stress, trauma, or personal problems and connect them with professional resources.