People of the Philippines vs. Yanson

A solitary tip, without more, does not constitute probable cause for a warrantless search of a moving vehicle; the exclusion of evidence obtained from such an invalid search—where the seized contraband constitutes the corpus delicti—compels acquittal for lack of proof of the crime charged.

On May 31, 1996, police officers in M'lang, North Cotabato received a radio message that a silver gray Isuzu pickup with plate number 619 was transporting marijuana from Pikit. Acting on this information, the police established a checkpoint and intercepted the vehicle, discovering two sacks of marijuana under the hood. The driver, Jaime Sison, and passengers, Leonardo Yanson and Rosalie Bautista, were arrested and charged with violating Section 4 of the Dangerous Drugs Act of 1972.

• The Tip and Checkpoint Setup: At 8:30 a.m. on May 31, 1996, the Municipal Police Station of M'lang received a radio message describing a silver gray Isuzu pickup with plate number 619 carrying three persons and transporting marijuana from Pikit. The Chief of Police instructed an alert team to set up a checkpoint at a riverside police outpost along the Matalam-M'lang road.
• The Search: At approximately 9:30 a.m., the described vehicle reached the checkpoint and was stopped. The team leader asked the driver, Sison, about inspecting the vehicle. Sison alighted and, at an officer's prodding, opened the pickup's hood, revealing two sacks of marijuana beside the engine.
• Seizure and Examination: The vehicle and occupants were brought to the police station. The Chief of Police retained the sacks and, the following day, brought them to the Davao City Crime Laboratory. Superintendent Mallorca examined the contents and reported that 5,637 grams tested positive for marijuana.
• Defense Version: Yanson testified that he was merely a passenger fetched by Sison and Bautista from his house in Surallah, South Cotabato, for a trip to Midsayap to retrieve something from the house of the Surallah Mayor (Sison's uncle). He claimed ignorance of the marijuana under the hood. Bautista testified she was merely hitchhiking to Marbel for her RTW business when offered a ride by Sison and Yanson.
• Trial Court Findings: The Regional Trial Court sustained the search as a valid warrantless search based on consent. It found conspiracy in the collective travel of the accused and noted inconsistencies in their testimonies (time of departure, destination, presence of a fourth companion).

• Lack of Probable Cause: Yanson maintained that the radio message was the sole basis for the search, constituting a solitary tip insufficient for probable cause. Citing People v. Vinecario, he argued that checkpoint searches without probable cause must be limited to visual inspection; the instruction to open the hood constituted an unreasonable intrusion.
• Invalid Consent: He asserted that Sison could not have freely consented to the extensive search given his surrounded position among armed police officers.
• Inapplicability of RA 9165: While acknowledging that RA 6425 governed at the time of the offense, Yanson claimed entitlement to the favorable amendatory provisions of RA 9165, specifically Section 21's chain of custody requirements, which he alleged were violated by the failure to mark and seal the sacks immediately.
• Lack of Conspiracy: He argued he was merely a passenger with no knowledge of the contraband concealed under the hood.

• Existence of Probable Cause: The Office of the Solicitor General countered that the verified information regarding the vehicle's description and cargo established probable cause, justifying an extensive search beyond visual inspection.
• Non-Retroactivity of RA 9165: The OSG argued that RA 9165, enacted in 2002, could not apply to an offense committed in 1996, and that in any event, the police adhered to the four critical links of the chain of custody.
• Conspiracy: The OSG maintained that conspiracy was demonstrated by the collective acts of the accused in traveling together with the contraband, requiring no direct proof of agreement.

• Probable Cause for Warrantless Search: Whether the warrantless search of the vehicle was valid based on probable cause or valid consent.
• Retroactive Application of RA 9165: Whether Section 21 of RA 9165 could be applied retroactively to the accused's benefit.
• Conspiracy: Whether conspiracy was established to hold Yanson liable for the transportation of marijuana.

• Invalid Warrantless Search: The warrantless search was invalid. Probable cause requires "a reasonable ground of suspicion supported by circumstances sufficiently strong in themselves to warrant a cautious man to believe that the person accused is guilty of the offense." A solitary tip, without the confluence of other suspicious circumstances, does not satisfy this standard. The police relied exclusively on the radio message describing the vehicle; no other overt acts or corroborating evidence justified the search.
• Lack of Valid Consent: The purported consent to open the hood was not voluntarily given. Sison was surrounded by armed police officers when asked to open the hood, rendering his compliance a mere passive conformity under intimidating circumstances rather than genuine consent.
• Exclusionary Rule and Corpus Delicti: The marijuana seized constitutes the corpus delicti of the crime. Under Article III, Section 3(2) of the Constitution, evidence obtained in violation of the right against unreasonable searches is inadmissible. Without the corpus delicti, the prosecution cannot establish the commission of the crime, necessitating acquittal.
• Effect on Co-Accused: Pursuant to Rule 122, Section 11(a) of the Revised Rules of Criminal Procedure, the acquittal extends to co-accused Sison and Bautista who did not appeal, as the judgment is favorable and applicable to them.

• Solitary Tip Insufficient for Probable Cause: Probable cause for a warrantless search cannot rest on a solitary tip alone; it requires the confluence of several suspicious circumstances that collectively warrant a reasonable inference of criminal activity.
• Consent in Warrantless Searches: Consent to a search must be voluntary and unequivocal; it cannot be inferred from passive conformity or submission to authority, particularly when the individual is confronted by multiple armed officers.
• Corpus Delicti in Drug Cases: In prosecutions for illegal transportation of drugs, the seized contraband itself constitutes the corpus delicti. Its inadmissibility due to constitutional violations in the search and seizure is fatal to the prosecution.
• Effect of Partial Appeal: Under Rule 122, Section 11(a), an appeal by one of several accused benefits non-appealing co-accused when the appellate court's judgment is favorable and applicable to the latter.

• "To be valid, searches must proceed from a warrant issued by a judge. While there are exceptions to this rule, warrantless searches can only be carried out when founded on probable cause, or 'a reasonable ground of suspicion supported by circumstances sufficiently strong in themselves to warrant a cautious man to believe that the person accused is guilty of the offense with which he is charged.' There must be a confluence of several suspicious circumstances. A solitary tip hardly suffices as probable cause; items seized during warrantless searches based on solitary tips are inadmissible as evidence."
• "In offenses involving illegal drugs, narcotics or related items establish the commission of the crime charged. They are the corpus delicti of the offense. The inadmissibility of illegally seized evidence that forms the corpus delicti dooms the prosecution's cause. Without proof of corpus delicti, no conviction can ensue, and acquittal is inexorable."
• "Sison did not have much of a choice when he was asked to open the hood of the vehicle. He could not have given his genuine, sincere consent."

• People v. Cogaed, 740 Phil. 212 (2014): Cited for the principle that law enforcers must not rely on a single suspicious circumstance in warrantless searches; the presence of more than one seemingly innocent activity, taken together, must warrant a reasonable inference of criminal activity.
• People v. Malmstedt, 275 Phil. 447 (1991): Distinguished as an example of a valid warrantless search where probable cause was founded on circumstances other than the original tip (bulge on waist, failure to produce passport).
• People v. Que, 333 Phil. 582 (1996): Distinguished as a case where the information received was specific and corroborated by visual confirmation of the described vehicle.
• Caballes v. Court of Appeals, 424 Phil. 263 (2002): Cited for the rule that the mobility of vehicles does not give police unlimited discretion to conduct indiscriminate searches without warrants absent probable cause.
• Aniag, Jr. v. Commission on Elections, 307 Phil. 437 (1994): Applied to establish that consent given under intimidating or coercive circumstances is no consent within the purview of the constitutional guaranty.

• Article III, Section 2, 1987 Constitution: Requires warrants to be issued by a judge upon probable cause determined personally after examination under oath; the basis for the warrant requirement and the definition of probable cause.
• Article III, Section 3(2), 1987 Constitution: Mandates that evidence obtained in violation of the right against unreasonable searches and seizures is inadmissible for any purpose in any proceeding (exclusionary rule).
• _Section 4, Republic Act No. 6425 (Dangerous Drugs Act of 1972): Penalizes the transportation of prohibited drugs; the law governing the offense at the time of commission (May 31, 1996).
• _Section 5, Republic Act No. 9165 (Comprehensive Dangerous Drugs Act of 2002): Penalizes the transportation of dangerous drugs; cited for comparison but held inapplicable due to non-retroactivity.
• Rule 122, Section 11(a), Revised Rules of Criminal Procedure: Governs the effect of appeal by one of several accused, providing that the judgment of the appellate court may affect non-appealing accused if favorable and applicable to them.

Peralta (Chairperson), Hernando, and Inting, JJ.