2010 Remedial Law, Q7

As Cicero was walking down a dark alley one midnight, he saw an “owner-type jeepney” approaching him. Sensing that the occupants of the vehicle were up to no good, he darted into a corner and ran. The occupants of the vehicle − elements from the Western Police District − gave chase and apprehended him.
The police apprehended Cicero, frisked him and found a sachet of 0.09 gram of shabu tucked in his waist and a Swiss knife in his secret pocket, and detained him thereafter. Is the arrest and body-search legal? (3%)

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What is required under Rule 113 for a warrantless arrest in flagrante delicto to be constitutionally valid?

Does a person's act of running away upon seeing an approaching unmarked vehicle at midnight justify a warrantless arrest?

What degree of suspicion is required to conduct a valid stop-and-frisk search under Philippine jurisprudence?

What is the legal status of drug evidence seized during an unlawful warrantless arrest and body-search?

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What is the legal relationship between a warrantless arrest and a search incidental to a lawful arrest?

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1. Warrantless Arrest Rules
Under Section 5, Rule 113 of the Rules of Court, a warrantless arrest by a peace officer is lawful only when the person to be arrested has committed, is actually committing, or is attempting to commit an offense in the officer's presence; when an offense has just been committed and the officer has probable cause based on personal knowledge of facts; or when the person is an escaped prisoner. Flight alone from approaching individuals in an unmarked vehicle at midnight does not constitute an overt illegal act or afford probable cause to justify a warrantless arrest.

2. Stop and Frisk
A valid stop-and-frisk search is a limited protective search for concealed weapons allowed when a police officer observes unusual conduct that leads him reasonably to conclude, in light of his experience, that criminal activity may be afoot. For a stop-and-frisk search to be constitutionally valid, it must be supported by genuine, articulable suspicion of criminal activity rather than mere suspicion or flight. A search conducted without genuine articulable suspicion renders the search illegal and any evidence seized during the search inadmissible in court.

3. Exclusionary Rule
Under Section 3(2), Article III of the 1987 Philippine Constitution, any evidence obtained in violation of the right against unreasonable searches and seizures is inadmissible for any purpose in any proceeding. This exclusionary rule, commonly known as the fruit of the poisonous tree doctrine, mandates that evidence seized pursuant to an unlawful warrantless arrest or illegal body-search cannot be used by the prosecution to establish guilt. Consequently, drugs and weapons confiscated during an illegal search must be excluded from the criminal proceedings.

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