PNP-SOSIA Private Detective study materials
PNP-SOSIA Private Detective study resources

PNP-SOSIA Private Detective key terms

PNP-SOSIA Private Detective · Get comfortable with the vocabulary.

RA 11917

Republic Act No. 11917 is the Philippine law that regulates the private security services industry, including private detective services. It replaced RA 5487 and set newer rules on licensing, training, and practice of the security profession.

Related: RA 5487, License to Operate, PNP-SOSIA
RA 5487

Republic Act No. 5487 is the older Private Security Agency Law that governed security and detective agencies for decades. Its rules on licensing and agency operations were largely carried over or superseded by RA 11917.

Related: RA 11917, PNP-SOSIA
PNP-SOSIA

The Supervisory Office for Security and Investigation Agencies is the Philippine National Police unit that licenses, monitors, and disciplines private security and detective agencies and their personnel.

Related: License to Operate, Private Security Agency, RA 11917
License to Operate

A license issued by the PNP-SOSIA that authorizes a person or entity to run a private security or detective agency. Operating without one is illegal and exposes the owner to criminal and administrative liability.

Related: PNP-SOSIA, Private Security Agency, RA 11917
Private Detective

A licensed professional who, for hire, investigates and gathers information about persons or events such as missing persons, fraud, and infidelity. Detectives must be licensed and must obey privacy and evidence laws.

Related: License to Operate, Confidentiality, Case Build-Up
Private Security Agency

A business licensed to provide security guards, detectives, or protective services to clients for a fee. Its license, personnel, firearms, and operations are regulated by the PNP-SOSIA.

Related: License to Operate, PNP-SOSIA, Post Orders
Felony

A felony is an act or omission punished by the Revised Penal Code. It may be committed with intent or with negligence, and it requires a voluntary act plus a resulting injury or danger.

Related: Dolo, Culpa, Conspiracy
Dolo

Dolo, or criminal intent, means the offender deliberately intends the unlawful act and its consequences. It requires freedom, intelligence, and intent, and it produces an intentional felony.

Related: Felony, Culpa, Praeter Intentionem
Culpa

Culpa refers to criminal negligence, where the offender fails to exercise the diligence required and causes harm unintentionally. The resulting felony is culpable rather than intentional.

Related: Felony, Dolo, Praeter Intentionem
Praeter Intentionem

A circumstance where the offender's act goes beyond what he intended, causing a graver consequence than planned. It can mitigate liability because the greater injury was not intended.

Related: Dolo, Felony
Conspiracy

Conspiracy exists when two or more persons agree to commit a felony and decide to carry it out. It may be proven by direct or circumstantial evidence of a common design.

Related: Felony, Complex Crime
Self-Defense

A justifying circumstance where a person uses necessary and reasonable force to repel unlawful aggression against himself or his rights, provided there is no sufficient provocation from the defender.

Related: Felony, Dolo
Complex Crime

A complex crime arises when a single act constitutes two or more grave or less grave felonies, or when an offense is a necessary means for committing another.

Related: Felony, Conspiracy
Probable Cause

Probable cause is a reasonable ground of suspicion, supported by facts and circumstances, that a person has committed a crime or that evidence will be found in a particular place.

Related: Search Warrant, Warrantless Arrest
Warrantless Arrest

An arrest made without a warrant in legally allowed situations, such as catching a person in the act, hot pursuit, or when the person is an escaped prisoner.

Related: Probable Cause, Search Warrant, Interrogation
Search Warrant

A written court order directing officers to search a specific place and seize described property. It must be based on probable cause personally determined by a judge.

Related: Probable Cause, Chain of Custody
Chain of Custody

The documented, unbroken sequence of who handled evidence and when, from seizure to court presentation. Gaps can weaken or destroy the evidence's admissibility and weight.

Related: Search Warrant, SOCO, Case Build-Up
Hearsay

Testimony or a document that repeats what someone else said outside court, offered to prove the truth of that statement. It is generally inadmissible because the declarant cannot be cross-examined.

Related: Dying Declaration, Interrogation
Dying Declaration

A statement made by a person who believes death is imminent, about the cause and circumstances of that death. It is an exception to the hearsay rule and is admissible in court.

Related: Hearsay
Case Build-Up

The process of gathering and organizing evidence, witness statements, and records to establish a case against a suspect before filing charges.

Related: Chain of Custody, SOCO, Probable Cause
SOCO

Scene of the Crime Operatives are police forensic teams that process a crime scene, photograph it, collect evidence, and document findings for investigation and court use.

Related: Chain of Custody, Forensic Ballistics, Case Build-Up
Interrogation

Questioning of a suspect by investigators to obtain admissions or information. It is subject to strict rules on rights, counsel, and voluntariness, and coerced statements are inadmissible.

Related: Warrantless Arrest, Entrapment, Polygraph
Entrapment

A tactic where officers induce a person to commit a crime he was already disposed to commit; it does not bar prosecution. If the person was not predisposed, it becomes inducement and may bar prosecution.

Related: Surveillance, Interrogation
Surveillance

The covert observation of persons, places, or activities to gather information or evidence. It must respect privacy laws and cannot include wiretapping without legal authority.

Related: Entrapment, Modus Operandi
Modus Operandi

The typical pattern or method a criminal uses in committing offenses. Investigators compare methods to link cases and identify possible suspects.

Related: Case Build-Up, Surveillance
Forensic Ballistics

The study of firearms, ammunition, and related tool marks. It matches bullets and shell casings to a weapon and helps reconstruct shooting incidents.

Related: Chain of Custody, SOCO, Locard's Exchange Principle
Dactyloscopy

The forensic study of fingerprints, including their patterns and comparison. Fingerprints are unique and durable, making them valuable for identification.

Related: Chain of Custody, Questioned Documents
Questioned Documents

Documents whose authenticity or meaning is disputed. Examiners compare handwriting, signatures, inks, and paper to detect forgery, alteration, or substitution.

Related: Dactyloscopy, Chain of Custody
Locard's Exchange Principle

The principle that every contact leaves a trace. When a person touches an object or another person, material is transferred in at least one direction.

Related: Chain of Custody, Forensic Ballistics
Polygraph

An instrument that records physical responses such as breathing, pulse, and skin conductance while a person answers questions. Results are investigative aids, not conclusive proof of truth.

Related: Interrogation
Span of Control

The number of subordinates directly reporting to one supervisor. A narrow span suits complex work, while a wide span suits routine, standardized tasks.

Related: Post Orders, Security Survey
Security Survey

A systematic inspection of a facility to identify vulnerabilities, evaluate existing safeguards, and recommend improvements to prevent loss or attack.

Related: Risk Assessment, Post Orders
Post Orders

Written instructions for guards at a specific post describing duties, patrols, access rules, and emergency procedures. They standardize performance and support accountability.

Related: Security Survey, Span of Control
Risk Assessment

The process of identifying threats, vulnerabilities, and potential loss, then estimating likelihood and impact to prioritize security measures and spending.

Related: Security Survey, Post Orders
Confidentiality

The ethical duty not to disclose client or case information learned through professional work, except when required by law or necessary to prevent serious harm.

Related: Conflict of Interest, Professional Ethics
Conflict of Interest

A situation where a detective's personal, financial, or other interest could improperly influence professional judgment, such as investigating a relative or a competitor's case.

Related: Confidentiality, Professional Ethics
Professional Ethics

The moral standards governing a detective's conduct, including honesty, fairness, confidentiality, and respect for the law and the client's legitimate interests.

Related: Confidentiality, Conflict of Interest
Spot Report

A brief written report sent immediately after an incident, covering the basic facts of who, what, when, where, why, and how for quick command awareness.

Related: Narrative Report, 5W1H
Narrative Report

A report written in continuous prose that describes events in chronological order, including background, actions taken, findings, and recommendations.

Related: Spot Report, 5W1H
5W1H

A reporting framework covering who, what, when, where, why, and how. It ensures basic facts are complete and easy to verify in any report.

Related: Spot Report, Narrative Report