Chain of Custody in Drug Cases: Why Strict Compliance with Section 21 Matters

In drug cases, the seized substance is the very heart of the prosecution's case. If the police cannot prove that the drugs presented in court are the same ones seized from the accused, the case falls apart. In People v. Roales (G.R. No. 233656, October 2, 2019), the Supreme Court reminded law enforcers that strict compliance with the chain of custody rule under Section 21 of Republic Act No. 9165 is not a mere technicality—it is a safeguard against planting of evidence and wrongful conviction.

The Facts of the Case

On July 18, 2015, operatives of the Pasig City Police conducted a buy-bust operation against alias "Charlie," later identified as Charles Roales y Permejo. A poseur-buyer handed marked money to Roales, who gave him a plastic sachet of suspected shabu. After the pre-arranged signal, the team arrested Roales and recovered three more sachets from him.

The police conducted an inventory at the place of arrest in the presence of Roales and an elected barangay official. However, no representative from the media or the Department of Justice (DOJ) was present. The police claimed they summoned a media representative, but none arrived. The trial court convicted Roales for illegal sale and illegal possession of shabu, and the Court of Appeals affirmed. Roales appealed to the Supreme Court.

The Issue

The central question was whether the prosecution proved Roales' guilt beyond reasonable doubt, particularly whether the chain of custody of the seized drugs was properly established despite the absence of the required witnesses during inventory.

The Ruling: Acquittal for Failure to Justify Non-Compliance

The Supreme Court reversed the conviction and acquitted Roales. The Court held that the prosecution failed to prove a justifiable ground for the absence of a representative from the media or the National Prosecution Service during the inventory.

Under Section 21(1) of RA 9165, as amended by RA 10640, the physical inventory and photographing of seized drugs must be conducted in the presence of: (1) the accused or his representative or counsel, (2) an elected public official, and (3) a representative of the National Prosecution Service or the media.

The Court noted that while non-compliance does not automatically invalidate the seizure, the prosecution must explain the reasons for the procedural lapse. The prosecution must prove the justifiable ground as a fact—the Court cannot presume what these grounds are or that they even exist. In this case, no explanation was given for the absence of a National Prosecution Service representative, and the mere claim that a media representative was summoned but did not arrive was insufficient.

The Court also stressed that stricter adherence is required when the quantity of drugs seized is minuscule, as in this case where only 0.07 gram and 0.23 gram of shabu were involved. Small amounts are highly susceptible to planting, tampering, or alteration.

The Chain of Custody Rule Explained

The chain of custody rule ensures that the drugs seized from the accused are the exact same items presented in court. Each link in the chain—from seizure, to marking, to inventory, to laboratory examination, to presentation in court—must be accounted for. The presence of the required witnesses during inventory is meant to guarantee against planting of evidence and frame-ups.

Practical Takeaways

• The prosecution bears the burden of explaining any deviation from Section 21 of RA 9165. Simply stating that a witness was unavailable is not enough; the reason must be proven as a fact.
• Police officers should document their efforts to secure the required witnesses, including any attempts to contact media or National Prosecution Service representatives, and state these in their sworn affidavits.
• The smaller the quantity of drugs, the stricter the compliance required. Courts are more vigilant where the seized amount is minuscule because it is more vulnerable to tampering.
• For defense lawyers, the absence of required witnesses during inventory—without a justifiable explanation—remains a strong ground for acquittal, even when the accused was caught in flagrante delicto.

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