Chain of Custody Imperative Safeguarding Rights in Drug Cases

In a significant ruling, the Supreme Court acquitted Ernesto Silayan y Villamarin of illegal drug sale charges after finding that police officers failed to comply with the mandatory chain of custody requirements under Republic Act No. 9165. The case underscores a critical safeguard: the prosecution must prove compliance with Section 21's procedural rules, or the accused benefits from reasonable doubt.

The Facts of the Case

On June 15, 2012, police officers conducted a buy-bust operation in Binangonan, Rizal, based on a tip about illegal drug activity. PO1 Rommel Bilog acted as the poseur-buyer, handing marked money to Silayan in exchange for a plastic sachet containing 0.04 grams of methamphetamine hydrochloride, or shabu. The officers arrested Silayan and marked the seized sachet on site.

The prosecution presented the sachet and a laboratory examination confirming it contained shabu. Both the Regional Trial Court and the Court of Appeals convicted Silayan, relying on the presumption of regularity in the performance of police duties.

The Core Issue

The central question was whether the police complied with Section 21(1), Article II of RA 9165, which governs the custody and disposition of seized drugs. The provision requires the apprehending team to physically inventory and photograph seized items immediately after confiscation, in the presence of:

• The accused or their representative or counsel
• A representative from the media
• A representative from the Department of Justice (DOJ)
• Any elected public official

These witnesses must sign the inventory and receive copies.

The Supreme Court's Ruling

The Supreme Court reversed the conviction and acquitted Silayan. The Court held that the prosecution failed to prove compliance with Section 21(1) and its Implementing Rules and Regulations (IRR).

The prosecution's evidence was ambiguous. PO1 Bilog's testimony merely stated he conducted the inventory "at the area," without clearly establishing where this was. More critically, the accused was not present during the inventory, and no representatives from the media, DOJ, or an elected public official attended.

No justifiable grounds were shown. The IRR allows deviation from strict compliance only when: (1) justifiable grounds exist for the departure, and (2) the integrity and evidentiary value of the seized items are preserved. The prosecution bears the burden of proving these requisites. In this case, the prosecution offered no explanation whatsoever for the absence of the required witnesses.

Presumption of regularity cannot save the case. The Court emphasized that this presumption cannot override the prosecution's duty to prove compliance with the law's mandatory procedures. As the Court noted, a buy-bust operation is a planned activity, giving police every opportunity to secure the required witnesses.

Why This Matters

The seized drug constitutes the corpus delicti—the body of the crime—in illegal drug cases. If the chain of custody is broken, the integrity and identity of the evidence become doubtful. The Court stressed that conviction must rest on the strength of the prosecution's evidence, not on the weakness of the defense.

The Court also issued prospective guidelines for prosecutors and courts to ensure Section 21 compliance, reminding law enforcement that preserving the integrity of seized items is essential to proving that a crime was committed.

Practical Takeaways

• Compliance is mandatory, not optional. Police must strictly follow Section 21(1) of RA 9165, including securing the three required witnesses during inventory and photographing of seized drugs.
• The prosecution must explain any deviation. If witnesses are absent, the prosecution must allege and prove justifiable grounds, such as the remoteness of the arrest site or earnest efforts to secure witnesses that proved futile.
• Presumption of regularity is not a shield. The prosecution cannot rely solely on the presumption of regularity in police duties to overcome a demonstrated failure to comply with procedural requirements.
• Planned operations have no excuse. Since buy-bust operations are planned, police have ample time to arrange for the presence of required witnesses.
• For the accused, procedural violations can lead to acquittal. A blatant failure to comply with Section 21, without justification, creates reasonable doubt warranting acquittal.

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