G.R. No. 234035 - People vs. Mamuyac, Jr. y Palma

Case Summary (G.R. No. 234035)

Factual Background: The Buy-Bust Operation and Seizure

The RTC narrated that an Information was filed on 2 April 2014 charging appellant with selling one heat-sealed transparent plastic sachet containing 0.0343 gram of methamphetamine hydrochloride (shabu) for PHP 500.00 to a police poseur-buyer PO1 Alexson T. Rosal, without authority or license. During the pre-trial conference, the parties stipulated that appellant was a resident of Brgy. 10, Estancia, Pasuquin, Ilocos Norte, and that on the evening of the incident appellant was at his house in Brgy. Estancia, Pasuquin, Ilocos Norte. The parties also agreed that the central issue would involve the legality of the arrest arising from the buy-bust operation.

As the prosecution’s account, PO1 Alexson Rosal testified that on 2 April 2014 at about 4:00 p.m., while on duty at the Pasuquin Police Station, an informant reported appellant’s alleged rampant drug selling. The information was relayed to the Chief of Police, who directed verification through intelligence operatives. After confirmation, the Chief briefed the team and conducted a buy-bust operation. PO1 Rosal was designated as the poseur-buyer, while the rest served as backup security. He was handed a five hundred peso bill with serial number LKO48833 and marked it for identification. The team proceeded to the target area in Brgy. 10, Pasuquin. With the informant, he rode a motorcycle in front of appellant’s house, with the rest of the team stationed near the subject house.

Appellant, upon seeing the informant, inquired how much was going to be bought. The informant replied that the amount was PHP 500.00. After the exchange, PO1 Rosal handed the buy-bust money to appellant, who placed it in his pocket and, at the same time, handed a plastic sachet containing white crystalline substance to PO1 Rosal. Appellant was then arrested after he attempted to run. When arrested, he surrendered and raised his hand bearing a gun, which was thereafter secured while he was frisked and handcuffed. PO2 John-John Garan recovered the buy-bust money. The police then brought appellant to the police station, where PO1 Rosal made markings on the plastic sachet, specifically “CPM1”, before turning it over to the station investigator PO2 Garan, who prepared an inventory. The drug was thereafter brought to the crime laboratory for chemical analysis, and the forensic chemist testified to a positive result for methamphetamine hydrochloride.

SPO1 Jonathan Caldito corroborated that they conducted a neighborhood investigation for about two hours after receiving reports, and thereafter conducted the buy-bust operation. He stated that they observed the transaction from about 25 meters, and that he saw PO1 Rosal execute a pre-arranged signal. He then helped arrest appellant after the other group approached.

PO2 John-John Garan likewise testified that the Chief of Police received a report about illegal drug selling by appellant, and that the team included PSI Ramos, PO1 Mario Corcoro, SPO1 Jonathan Caldito, PO3 Joel Bulosan, PO2 Garan, and PO1 Gonzaga. Garan acted as perimeter security and observed from the eastern part of the road. He testified that after the poseur-buyer and informant entered the house and exchanged items, the Chief of Police’s group approached, ran toward appellant’s house, and assisted in the arrest. After appellant was held, Garan searched him and recovered the buy-bust money, then turned over the recovered item to PO1 Rosal. He testified that an inventory was prepared and that photographs were taken in the presence of Brgy. Captain Precidio Palalay and other barangay kagawads. He stated that he placed markings on the drug container “CPM” or “CPM1” based on his receipt from PO1 Rosal at the police station. After this, the items were brought for laboratory examination.

Proceedings at the RTC

In the RTC proceedings, Brgy. Chairman Precidio Caliva Palalay was presented by the prosecution as a hostile witness, focusing on the certification he allegedly issued. Palalay testified that he could not recall signing the questioned certification. He later admitted that the signature resembled his, but he claimed the document he signed was for a tree planting project and not for a certification that appellant was a drug personality under a BAD AC watch list. He also stated he had no knowledge about the buy-bust operation and admitted that he did not sign the inventory receipt.

Appellant denied selling shabu. He testified that on 2 April 2014 at around 4:00 p.m., he was coming from the house of the barangay chairman and was eating when several men entered his residence. He claimed he recognized police officers John-John Garan and Leumuel Bulosan, and he alleged that the Chief of Police outside wore a blonde wig as disguise. Appellant alleged he was forcibly carried out at gunpoint, taken to a mobile car, and told by PO1 Alexson Rosal that it was a standard operating procedure and that they were looking for a “baby armalite.” He stated his arrest was allegedly caused by the barangay chairman. He denied the sale to PO1 Rosal and admitted he did not lodge any complaint because he was in jail and could not attend.

After trial, the RTC convicted appellant of violating Section 5, Article II of RA 9165 and imposed life imprisonment, a fine of PHP 500,000.00, and costs. The RTC held the buy-bust operation and arrest as legal. It also ruled that the prosecution established the illegal sale elements: identity of buyer and seller, object and consideration, delivery of the thing sold, and payment. As to custody, the RTC acknowledged imperfections in strictly following Section 21, but held that non-compliance was not fatal because integrity and evidentiary value had been preserved. It noted that physical inventory and photographs were submitted, including an inventory annotation that barangay officials refused to sign, and it found that markings and chemical analysis tied to the same specimen.

CA Review and Affirmance

On appeal, the Court of Appeals affirmed the conviction. It sustained the RTC’s view that the integrity and evidentiary value of the seized shabu were safeguarded, and that the prosecution proved the buy-bust sale beyond reasonable doubt. The CA emphasized PO1 Rosal’s identification of appellant as the seller and the transfer of the sachet containing 0.0343 gram of white crystalline substance that tested positive for shabu.

Issues Raised on Appeal

Appellant’s assigned errors in the appeal focused on the alleged mishandling and non-compliance with Section 21 chain-of-custody safeguards, particularly: the marking and inventory being done at the police station instead of immediately at the place of arrest; the refusal of Barangay Chairman Palalay to sign the inventory receipt because he was not present during inventory; PO1 Rosal’s admission that he placed the sachet in his pocket before it was brought to the police station; asserted inconsistencies between PO1 Rosal and PO2 Garan; and an overall claim that the prosecution failed to prove guilt beyond reasonable doubt.

The Supreme Court’s Ruling: Acquittal on Reasonable Doubt

The Court granted the appeal and acquitted appellant. It reversed and set aside the decisions of the RTC and CA and ordered appellant’s immediate release from detention unless lawfully held for another cause.

Legal Basis and Reasoning: Strict Chain of Custody Under Section 21, RA 9165

The Court anchored its analysis on the exacting requirements for chain of custody under Section 21 of RA 9165, applying the pre-amendment version effective on 2 April 2014, prior to the effect of RA 10640 on 15 July 2014. The Court stressed that, while a miniscule amount of drugs does not automatically mandate acquittal, it underscores the necessity for heightened scrutiny and more exacting compliance with Section 21, especially when the seized substance is small, fungible, and susceptible to tampering, loss, or mistake. The Court drew from its prior rulings, including People v. Holgado, where it had treated the quantity as miniscule and emphasized heightened compliance, and Malillin v. People, which warned that the likelihood of tampering is greatest when exhibits are small and physically similar to substances familiar to people in daily life.

Applying that heightened scrutiny, the Court held that the prosecution failed to comply with chain of custody requirements. It reasoned that under the applicable law on 2 April 2014, Section 21(1) required immediate physical inventory and photographing after seizure and confiscation in the presence of the accused or representative or counsel, a media representative, DOJ representative, and an elected public official required to sign the copies of the inventory and receive a copy. The prosecution did not show justifiable grounds for dispensing with these requirements.

The Court also reviewed the prosecution’s own lapses and the defense’s corresponding challenges. It gave weight to appellant’s contention that the sachet was not marked at the place of arrest but only at the police station, allegedly because their Chief of Police ordered it. The Court found this deviation unjustified, particularly because no threat or hostile environment was established that would have warranted transfer before marking.

The Court further noted that inventory and photography were also conducted at the police station rather than immediately at the crime scene or the nearest practicable place. It treated these as matters requiring justification for non-compliance, not assumptions, and it highlighted that Barangay Chairman Palalay explicitly denied signing the inventory receipt. In addition, the Court considered appellant’s evidentiary challenge that PO1 Rosal placed the sachet in his pocket from seizur

Case Syllabus (G.R. No. 234035)

People of the Philippines prosecuted appellant Crispin Mamuyac, Jr. y Palma for violation of Section 5, Article II of Republic Act No. 9165.
The appeal assailed the Court of Appeals (CA) Decision dated 7 November 2016 which affirmed the Regional Trial Court (RTC) Decision dated 17 August 2015.
The Supreme Court resolved the appeal by reversing both the RTC and CA, and by ordering acquittal on reasonable doubt.

Parties and Procedural Posture

The appellant was Crispin Mamuyac, Jr. y Palma, while the appellee was People of the Philippines.
The RTC convicted appellant in Criminal Case No. 2194-19 for sale of shabu.
The CA dismissed the appeal and affirmed the RTC conviction.
The Public Attorney’s Office (PAO) manifested appellant’s intent to appeal by filing a Notice of Appeal dated 24 November 2016.
The Office of the Solicitor General (OSG) and the PAO later filed Manifestations (In Lieu of Supplemental Brief), with PAO stating it would no longer file a supplemental brief.
The Supreme Court granted the appeal, reversed the RTC and CA decisions, and ordered appellant’s immediate release unless lawfully held for another cause.

Key Factual Allegations

The Information charged appellant that on or about 7:30 p.m. of 2 April 2014, at Brgy. #14, Estancia, Pasuquin, Ilocos Norte, he sold to a police poseur-buyer one heat-sealed transparent plastic sachet containing 0.0343 gram of methamphetamine hydrochloride, commonly known as shabu, for P500.00.
The charge alleged that the sale was done without authority or license from the appropriate government agency.
The parties stipulated during pre-trial that appellant was a resident of Brgy. 10, Estancia, Pasuquin, Ilocos Norte, and that at about 7:30 p.m. of 2 April 2014 appellant was in their house in the same barangay.
The parties also agreed to center the issue on the legality of the arrest arising from the buy-bust transaction so that appellant would be held answerable.

Prosecution’s Evidence Summary

PO1 Alexson Rosal testified that an informant reported appellant’s rampant selling of dangerous drugs at the Pasuquin Police Station, and the report was relayed to the Chief of Police.
The Chief of Police briefed the arrest team for a buy-bust operation, coordinated with PDEA and INNPO-PAIDSOTG, and designated PO1 Rosal as the poseur-buyer with the rest providing backup security.
PO1 Rosal received a five hundred peso bill marked with the serial number LKO48833 and had markings “JTC” on the forehead of Ninoy Aquino to be used as buy-bust money.
The team proceeded to the target area at Brgy. 10, Pasuquin, and PO1 Rosal with the informant approached in front of appellant’s house.
Appellant asked how much was to be bought, the informant answered P500.00, appellant received the money, and appellant handled a plastic sachet to PO1 Rosal.
PO1 Rosal testified that appellant was arrested after handling the sachet to him, and after the pre-arranged signal executed by PO1 Rosal by calling his cell phone.
PO1 Rosal testified that appellant may have sensed he was dealing with a police officer, ran toward the living room, and was heard to cock a gun.
PO1 Rosal testified that the Chief of Police convinced appellant to surrender, appellant raised his hand holding his gun, and PO2 John-John Garan frisked and handcuffed him.
PO2 Garan recovered the buy-bust money, and PO1 Rosal testified that from arrest until arrival at the police station, the seized item remained in his possession.
At the police station, PO1 Rosal made markings on the plastic sachet, “CPM1,” and later turned the specimen over to PO2 Garan for inventory and investigation.
SPO1 Jonathan Caldito testified that he conducted a “neighborhood investigation” for about two hours which validated the report, and that a buy-bust operation followed based on a positive result.
SPO1 Caldito testified the team positioned itself about 25 meters away in a dark area, observed the transaction, and saw PO1 Rosal execute a pre-arranged signal.
PO2 John-John Garan testified he was assigned perimeter security, observed the poseur-buyer and informant enter appellant’s house and transact, and saw appellant and PO1 Rosal exchange items.
PO2 Garan testified that after subduing appellant, he searched appellant and recovered the buy-bust money, then turned over the recovered item to PO1 Rosal.
PO2 Garan testified that an inventory was made and pictures were taken in the presence of Brgy. Captain Precidio Palalay and other barangay kagawads, and he placed markings “CPM” on the shabu container representing the initial of appellant because he received it from the poseur-buyer at the police station.
PO2 Garan testified that the seized item was brought to the PNP crime laboratory for chemical analysis with PO1 Rosal.
Forensic Chemist Amiely Ann Navaro testified that the chemical examination of the submitted specimen was positive for methamphetamine hydrochloride, and she made markings “AALN” on the specimen placed in a larger sachet when she retrieved it from the evidence custodian.
The prosecution dispensed with SPO4 Nilo Domingo after admission of his proffered testimony on the circumstances of evidence turnover and the claim of proper documentation in the crime laboratory logbook.
Brgy. Chairman Precidio Caliva Palalay was presented as a hostile witness; he did not recall signing the certification, acknowledged similarity to his signature, but stated the document he recalled signing involved a tree planting project and not a certification that appellant was under a drug personality watch list.
In cross-examination, Palalay admitted he had no knowledge of the buy-bust operation and that he did not sign the inventory receipt.

Defense Evidence Summary

Appellant testified that on 2 April 2014 at about 4:00 p.m., he came home and was eating, when several men entered his residence and he recognized police officers John-John Garan and Leumuel Bulosan.
Appellant testified that the Chief of Police posted outside wore a blonde wig and that guns were aimed at him, leading to forcible removal and transport to a mobile car.
Appellant testified that PO1 Rosal told him it was standard operating procedure and they were looking for a “baby armalite,” and that appellant believed his arrest was caused by the barangay chairman.
Appellant denied selling shabu to PO1 Rosal.
Appellant admitted he was familiar with PO1 Rosal because of a checkpoint and because PO1 Rosal’s wife was a co-worker of appellant’s wife.
Appellant testified that he did not file a complaint against arresting police officers due to his being in jail and lack of ability to attend.
The defense adopted the testimony of Brgy. Chairman Precidio Palalay as presented by the prosecution due to being a common witness.
A