Law Enforcement Fundamentals & Police Ethics - Cheat sheet
Your last-minute revision companion for mastering police fundamentals and ethical standards before the PNPAE exam
Police Role in Democracy
Important facts
- Police enforce law WITHOUT bias
- Police maintain order WITHOUT infringing rights
- Police protect lives, property, and constitutional rights
- Police serve the community - accessible, accountable, helpful
- Police prevent crime through visibility and intelligence
- Police respond to crime through investigation and arrest
Key definitions
Peace Officer
Example
Traffic officer using verbal commands before physical restraint
Police officer who uses minimum necessary force, not maximum force like military
Democratic Policing
Example
Arresting suspects while ensuring due process
Law enforcement that serves citizens while protecting constitutional rights
Three Core Police Functions
Important facts
- Prevention: patrol presence, community engagement, predictive policing
- Suppression: response to crimes, stops, arrests, lawful searches
- Investigation: crime scene processing, evidence preservation, witness interviews
- All three functions work together in comprehensive policing
- Prevention is most cost-effective approach
Key definitions
Crime Prevention
Example
Patrol presence, community engagement, crime mapping
Proactive measures to stop crimes before they occur
Crime Suppression
Example
Response to crimes in progress, arrests, lawful search
Active response to ongoing criminal activities
Crime Investigation
Example
Crime scene processing, evidence collection, case build-up
Systematic examination of crimes for prosecution
Diagrams to know
- Crime prevention strategies flowchart
- Investigation process diagram
Use of Force Continuum
Important facts
- 1. Officer presence - visible deterrent
- 2. Verbal commands - clear, calm directions
- 3. Soft empty-hand control - guiding, restraining
- 4. Hard empty-hand control - strikes if needed
- 5. Less-lethal weapons - Taser, baton, OC spray
- 6. Lethal force - ONLY when lives in imminent danger
- Each level must be justified by circumstances
- Officers must use minimum force necessary
Key definitions
Use of Force Continuum
Example
Officer presence → verbal → soft control → hard control → less-lethal → lethal
Progressive levels of force from presence to lethal force
Necessary and Proportionate
Example
Using verbal commands for minor violations, not physical force
Force must match threat level and be minimum required
Diagrams to know
- Use of force continuum pyramid
- Decision-making flowchart for force options
Stop, Search, and Arrest
Important facts
- Search requires WARRANT or valid exception
- Warrantless arrest allowed: in flagrante delicto, hot pursuit, escapee
- Frisk only allowed with reasonable suspicion of weapons
- Search exceptions: incident to arrest, plain view, consent, hot pursuit, exigent circumstances
- Miranda rights must be given upon custody
- Chain of custody must be maintained for evidence
Key definitions
Terry Stop
Example
Stopping suspicious person near crime scene
Brief detention to investigate possible criminal involvement
Frisk
Example
Checking for weapons during traffic stop
Limited pat-down of outer clothing for weapons only
In Flagrante Delicto
Example
Person seen stealing from store
Caught in the act of committing a crime
Diagrams to know
- Search warrant exceptions chart
- Arrest procedures flowchart
Crime Scene Management
Important facts
- First priority: render aid to victims
- Establish outer and inner perimeters immediately
- Document all arrivals and departures
- Take photos: overview, mid-range, close-up
- Separate witnesses to prevent contamination
- Use proper packaging for different evidence types
- Maintain detailed chronological notes
Key definitions
Chain of Custody
Example
Officer A collected → Officer B transported → Lab C analyzed
Documentation of every person who handled evidence
Crime Scene Perimeter
Example
Yellow tape for outer, restricted access for inner
Controlled area around crime scene with outer and inner boundaries
Diagrams to know
- Crime scene layout diagram
- Evidence collection process
Police Ethics Core Principles
Important facts
- HONESTY - no lies, no manipulation
- INTEGRITY - consistent ethical behavior
- FAIRNESS - no favoritism or discrimination
- RESPECT - for all citizens, suspects, colleagues
- RESTRAINT - minimum force, careful judgment
- ACCOUNTABILITY - answer for all actions
- SERVICE - public welfare above self-interest
Key definitions
Police Integrity
Example
Not accepting bribes even when unobserved
Same ethical conduct in private as in public
Police Accountability
Example
Reporting use of force incidents truthfully
Taking responsibility for all actions and decisions
Diagrams to know
- Ethics decision-making flowchart
- Ethical dilemma resolution process
PNP Code and Legal Framework
Important facts
- R.A. 3019 - Anti-Graft and Corrupt Practices Act
- R.A. 6713 - Code of Conduct for Public Officials
- R.A. 7080 - Anti-Plunder Act
- R.A. 9485 - Anti-Red Tape Act
- R.A. 9745 - Anti-Torture Act
- NAPOLCOM - National Police Commission oversight
- CHR - Commission on Human Rights jurisdiction
- PLEB - People's Law Enforcement Boards local oversight
Key definitions
PNP Code of Ethics
Example
Service to people above personal interest
Official conduct standards for Philippine National Police
Internal Affairs Service
Example
IAS investigates corruption complaints
PNP unit that investigates misconduct allegations
Diagrams to know
- PNP organizational structure
- Oversight bodies relationship chart
Investigation Fundamentals
Important facts
- Fingerprints: loops, whorls, arches - each person unique
- Ballistics: tool marks on bullets match specific firearms
- DNA evidence requires proper collection and preservation
- Chain of custody critical for evidence admissibility
- Document everything: photos, sketches, notes
- Interview witnesses separately to prevent contamination
- Reports must be accurate, complete, concise, objective, timely
Key definitions
Five W's and One H
Example
Who was involved, What happened, When did it occur
Who, What, When, Where, Why, How - foundation of every report
Forensic Evidence
Example
Fingerprints, DNA, ballistics, trace evidence
Physical evidence that can be scientifically analyzed
Diagrams to know
- Investigation process flowchart
- Evidence types classification
Must remember
- Use of Force Continuum: Officer presence → Verbal → Soft control → Hard control → Less-lethal → Lethal
- Warrantless arrest only for: in flagrante delicto, hot pursuit, escapee
- Police ethics core: Honesty, Integrity, Fairness, Respect, Restraint, Accountability, Service
- Crime scene priorities: 1) Aid victims 2) Secure scene 3) Document everything 4) Preserve evidence
- Five W's and One H: Who, What, When, Where, Why, How
- Chain of custody must be maintained for all evidence
- Miranda rights required immediately upon custody
- Police are peace officers - minimum necessary force, not maximum force
- Search requires warrant OR valid exception (incident to arrest, plain view, consent, exigent circumstances)
- PNP Code: Service to people above personal interest, loyalty, discipline, honesty, justice
Last minute tips
- For use of force questions, always check if the force level matches the threat - look for 'necessary and proportionate'
- In arrest scenarios, identify if it's warrantless (must be flagrante delicto, hot pursuit, or escapee) or needs warrant
- Ethics questions often test loyalty conflicts - the answer is usually 'report up the chain' and 'document everything'
- Crime scene questions prioritize victim aid first, then securing the scene - never contaminate evidence
- Remember the difference: police use minimum necessary force, military uses maximum proportionate force
Comparison tables
Warrant vs Warrantless Actions
| Aspect | With Warrant | Warrantless Exception |
|---|---|---|
| Search | Standard requirement | Incident to arrest, plain view, consent, exigent circumstances |
| Arrest | Standard requirement | In flagrante delicto, hot pursuit, escapee |
| Legal Protection | Strong judicial oversight | Must justify reasonableness after |
| Evidence Admissibility | Presumed valid | Must prove exception applies |
Crime Functions Comparison
| Function | Focus | Methods | Timing |
|---|---|---|---|
| Prevention | Stop crimes before they happen | Patrol, community engagement, education | Proactive |
| Suppression | Stop crimes in progress | Response, arrests, force if needed | Reactive - immediate |
| Investigation | Solve crimes after they happen | Evidence collection, interviews, analysis | Reactive - follow-up |
Diagrams
Police Role in Democratic Society
Shows the interconnected responsibilities of police in a democratic system
Use of Force Decision Process
Decision tree showing proper escalation of force based on subject compliance and threat level
Crime Scene Management Process
Step-by-step process for managing crime scenes from arrival to report completion
Arrest Authority States
Shows the different legal pathways that lead to lawful arrest authority