Arrest, Search and Seizure, and Rules of Evidence
This domain tests the legality of the arrest, the search that follows it, and whether what you found can be used. Illegally obtained evidence is worthless and can expose you to criminal and civil liability.
Warrants and the warrantless exceptions
A search warrant needs probable cause personally determined by a judge, on oath, and must particularly describe the place, person, or things. Article III, Section 3(2) of the 1987 Constitution bars unreasonable searches. The recognised exceptions a guard may rely on:
- Search incident to a lawful arrest - for weapons and evidence of the offence.
- Plain view - the item is immediately apparent, the officer is lawfully in position, and the discovery is inadvertent.
- Consent or waiver - voluntary, clear, and not the product of threat or trickery.
- Stop-and-frisk - limited pat-down on reasonable suspicion that the person is armed.
- Customs and posted entry conditions - baggage and body screening at controlled points.
The private-search rule
Philippine jurisprudence (People v. Marti) holds that the Bill of Rights protects against state action; a search by a purely private security officer is not a constitutional search. But once police direct your actions, you become an instrument of the state and the exclusionary rule applies.
Evidence handling and drugs
For drug cases, Section 21 of RA 9165 as amended by RA 10640 requires immediate marking, inventory, and photograph, witnessed by an elected official plus a representative of the National Prosecution Service or the media, with laboratory submission within 24 hours.
Worked example
A guard searching a visitor's bag at a posted inspection point finds an unlicensed firearm. The inspection is a valid condition of entry, not a police search, so the item is not excluded on constitutional grounds. The guard must not handle it beyond necessity, must record the finder's name and time, and must turn it over to police with a documented chain of custody.
Traps that cost marks
Marking evidence hours later; multiple handlers with no log; treating a waived right as automatically valid; assuming any bag search is lawful regardless of signage.