Safeguarding Integrity: Strict Enforcement of Chain of Custody in Drug Cases

In a significant ruling that underscores the strict enforcement of the chain of custody rule in drug cases, the Supreme Court acquitted an accused-appellant in People of the Philippines v. Tayan y Balviran and Sampa y Omar (G.R. No. 242160, July 8, 2019). The case highlights the Court's firm stance that procedural lapses in the handling of seized drugs—especially the absence of required witnesses—can create reasonable doubt sufficient to overturn a conviction, even when the accused was caught in a buy-bust operation.

The Case: A Buy-Bust Operation in Quezon City

On February 24, 2014, PDEA agents conducted a buy-bust operation against Jan Jan Tayan and Aiza Sampa in Fairview, Quezon City. The poseur-buyer purchased a plastic sachet containing 50.6374 grams of methamphetamine hydrochloride (shabu) from Tayan, who received the item from Sampa. Both were arrested, and the seized drug was later confirmed positive for shabu. The Regional Trial Court convicted both accused of violating Section 5, Article II of Republic Act No. 9165 (Comprehensive Dangerous Drugs Act of 2002), imposing life imprisonment and a fine of P500,000. The Court of Appeals affirmed the conviction. On appeal, the Supreme Court reversed and acquitted Sampa.

The Issue: Compliance with the Chain of Custody Rule

The central issue was whether the PDEA agents substantially complied with Section 21 of RA 9165 and its Implementing Rules and Regulations (IRR), which govern the custody and disposition of seized drugs. The Court found significant deviations: the seized item was marked inside the service vehicle, not at the place of arrest; inventory and photographing were conducted hours later at the PDEA office in Laguna, not at the nearest police station; and only a media representative—who merely signed the certificate without witnessing the inventory—was present. No DOJ representative or elected public official was secured.

The Ruling: Strict Compliance Required

The Supreme Court acquitted Sampa on the ground of reasonable doubt, emphasizing that the prosecution must prove the identity of the illicit drug with moral certainty, as it constitutes the corpus delicti of the crime. The Court reiterated that marking, inventory, and photographing must be done immediately after seizure in the presence of the accused, a media representative, a DOJ representative, and an elected public official.

The Court rejected the prosecution's excuse of a "commotion" as justification for the lapses, noting that the alleged commotion was not established by evidence. It also emphasized that the presence of the three insulating witnesses is mandatory, not a mere formality. Citing People v. Dela Cruz, the Court stressed that these witnesses protect against planting, switching, or tampering of evidence. The saving clause in Section 21(a) of the IRR, which allows non-compliance under justifiable grounds, was not applied because the prosecution failed to provide credible explanations for the deviations.

Practical Takeaways

• Strict adherence to Section 21 is non-negotiable. Police officers must conduct marking, inventory, and photographing of seized drugs immediately after seizure, in the presence of the accused and the three required witnesses: a media representative, a DOJ representative, and an elected public official.
• The presence of witnesses at the time of arrest is crucial. The three witnesses must be at or near the place of arrest, not merely called in later for the inventory. Their presence at the moment of seizure ensures the integrity of the evidence.
• Excuses must be proven. The "commotion" defense or claims of witness unavailability must be supported by credible evidence. Unsubstantiated excuses will not justify non-compliance.
• The saving clause requires a clear showing. To invoke the saving mechanism, the prosecution must prove justifiable grounds and demonstrate that the integrity and evidentiary value of the seized items were preserved.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.