Strict Compliance with Chain of Custody Rules in Drug Cases: People v. Acub

The Supreme Court has consistently reminded law enforcers that the rules on the custody of seized illegal drugs are not mere formalities. In People v. Acub (G.R. No. 220456, June 10, 2019), the Court reversed a conviction for illegal sale of shabu because the police failed to strictly comply with Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act. The ruling underscores that the "saving clause" in the law cannot be used as a blanket excuse for procedural lapses.

The Facts of the Case

On February 10, 2005, a confidential informant tipped off police in Zamboanga City that a certain "Asaw" was selling illegal drugs. A buy-bust operation was planned, and a police officer acted as poseur-buyer with a marked P500.00 bill. The accused, Gajir Acub, allegedly sold a plastic sachet containing 0.0188 gram of shabu to the officer.

At the police station, the arresting officer marked the sachet with his initials before turning it over to another officer, who marked it again and delivered it to the crime laboratory. The accused denied the charge, claiming he was stopped, searched, and brought to the police station without a warrant. His wife corroborated his story.

The Regional Trial Court convicted Acub, relying on the presumption of regularity in the performance of police duties. The Court of Appeals affirmed, ruling that despite noncompliance with Section 21, the integrity of the seized item was preserved.

The Issue

The sole issue was whether Acub's guilt was proven beyond reasonable doubt despite the police officers' failure to strictly comply with Section 21 of RA 9165.

The Ruling: Strict Compliance Is the Standard

The Supreme Court acquitted Acub. The Court reiterated that the corpus delicti—the dangerous drug itself—must be presented in evidence, and its identity must be clearly established. Because narcotic substances are not readily identifiable and are susceptible to tampering, the chain of custody rule serves as a method of authentication.

Section 21, as amended by RA 10640, requires the apprehending team to conduct a physical inventory and photograph the seized items immediately after seizure, in the presence of the accused (or his representative or counsel), an elected public official, and a representative of the National Prosecution Service or the media. These witnesses must sign the inventory and receive a copy.

The Court emphasized that strict compliance is the expected standard. Deviations leave the door open for tampering, substitution, and planting of evidence. Even acts that merely approximate compliance have been held insufficient.

The Saving Clause Is Not a Blanket Excuse

The law contains a saving clause: noncompliance under justifiable grounds, as long as the integrity and evidentiary value of the seized items are preserved, shall not render the seizure void. However, the Court clarified that for this clause to apply, the prosecution must prove two things:

1. That the noncompliance was justified; and
2. That the integrity and evidentiary value of the seized item were preserved.

The prosecution must not only explain why the requirements were not followed—it must prove the justifiable grounds during trial. Examples of justifiable reasons include the remoteness of the arrest site, safety threats, or earnest efforts to secure witnesses that proved futile.

Why the Conviction Was Reversed

In this case, the prosecution offered no explanation at all for the police officers' failure to conduct an inventory and photograph the seized sachet in the presence of the required witnesses. The Court noted that the seized item was a minuscule 0.0188 gram—practically a grain of rice—which magnifies the danger of tampering or planting.

The Court rejected the lower courts' reliance on the presumption of regularity. As it explained, a gross, systematic, or deliberate disregard of procedural safeguards effectively produces an irregularity in the performance of official duties. The unjustified lapses created a substantial gap in the chain of custody, casting serious doubt on the integrity and evidentiary value of the corpus delicti.

Practical Takeaways

• Chain of custody is critical. Police must strictly follow Section 21 of RA 9165 when handling seized drugs, from seizure to laboratory examination to court presentation.
• The saving clause requires proof. The prosecution cannot simply invoke it; it must show justifiable grounds for noncompliance and prove that the drug's integrity was preserved.
• Small amounts demand more care. The smaller the seized quantity, the greater the risk of tampering, and the more exacting the compliance required.
• Presumption of regularity is not automatic. Gross disregard of procedural safeguards negates the presumption of regularity in police conduct.
• For the accused, procedural lapses matter. A conviction can be overturned if the prosecution fails to establish an unbroken chain of custody.

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