Reasonable Doubt and Chain of Custody: When Police Lapses Lead to Acquittal in Drug Cases

In drug cases, the seized substance is the very heart of the prosecution's case. If its identity and integrity are compromised, the case falls apart. In People v. Labsan y Nala (G.R. No. 227184, February 6, 2019), the Supreme Court acquitted two accused because police officers failed to follow the mandatory chain of custody rules under Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002. The ruling is a firm reminder that law enforcers must operate within the bounds of the law, and that procedural shortcuts can cost the State a conviction.

The Facts of the Case

In the early morning of September 29, 2012, police officers in Cagayan de Oro City conducted a buy-bust operation against Bryan Labsan and Clenio Dante based on information from a confidential informant. The police claimed that a poseur-buyer purchased one sachet of shabu from the two men, and that a search yielded additional sachets from their possession.

The accused were charged with illegal sale and illegal possession of dangerous drugs. The Regional Trial Court convicted them, and the Court of Appeals affirmed. Both courts held that while the police did not strictly comply with Section 21, the integrity of the drugs was nonetheless preserved.

The Supreme Court disagreed and acquitted the accused on grounds of reasonable doubt.

The Issue

The central question was whether the prosecution had proven the accused's guilt beyond reasonable doubt, given the police officers' failure to comply with the mandatory requirements of Section 21, Article II of RA 9165.

The Ruling: Strict Compliance Matters

The Supreme Court ruled that the prosecution failed to establish the identity and integrity of the seized drugs—the corpus delicti—because of multiple procedural breaches.

Section 21 requires that seized drugs be inventoried and photographed immediately after seizure, in the presence of the accused or counsel, an elected public official, a media representative, and a Department of Justice representative. These witnesses must sign the inventory and receive copies.

The Court emphasized that this is not a mere technicality. The presence of these witnesses at or near the place of arrest is crucial because it is at that moment that their presence is most needed to ensure the source, identity, and integrity of the seized drugs.

The Police Lapses in This Case

The Court identified several fatal errors by the buy-bust team:

No immediate marking. The seized sachets were not marked at the place of seizure. Marking was done later at the police station by SPO1 Tarre, who was not even part of the buy-bust team. The Court stressed that marking is the starting point of the custodial link and prevents switching, planting, or contamination of evidence.

No required witnesses. None of the three required witnesses—an elected official, a media representative, and a DOJ representative—was present at the apprehension or the inventory. PO3 Baillo admitted there was no other civilian at the police station except the accused, and no barangay official was invited.

No justifiable explanation. The prosecution offered no explanation for the non-compliance. PO3 Vicente admitted that despite knowing the requirements, the team did not try to secure witnesses.

Presumption of Regularity vs. Presumption of Innocence

The lower courts relied on the presumption of regularity in the performance of official duty. The Supreme Court rejected this. The police officers' acknowledged lapses were affirmative proof of irregularity, which negated the presumption.

The Court held that the presumption of regularity cannot overcome the constitutional presumption of innocence. Otherwise, a mere rule of evidence would defeat a constitutionally protected right.

A Fabricated Buy-Bust?

The Court went further, finding that the deliberate disregard of legal requirements cast doubt on whether a legitimate buy-bust operation even occurred. The absence of unbiased witnesses, the failure to mark drugs at the scene, and the lack of inventory in the presence of required witnesses lent credence to the accused's claim that they were merely arrested and pressured to admit to a crime.

The Court directed the National Police Commission to investigate the officers involved and reminded trial courts to exercise extra vigilance in drug cases.

Practical Takeaways

• Chain of custody is substantive, not procedural. Compliance with Section 21 of RA 9165 is essential to preserve the integrity of the seized drugs. Failure to comply can result in acquittal, even if the drugs tested positive for shabu.
• Marking must be immediate and by the seizing officer. The apprehending officer or poseur-buyer should mark the seized items at the place of arrest. Delayed marking by another officer raises reasonable doubt.
• The three-witness rule is mandatory. The presence of an elected public official, a media representative, and a DOJ representative during inventory and photographing is not optional. Their absence must be justified with a credible explanation.
• Earnest efforts must be shown. If witnesses are not secured, the prosecution must prove that the police exerted earnest efforts to comply and that their actions were reasonable under the circumstances.
• Presumption of regularity has limits. Police officers are presumed to perform their duties regularly, but this presumption cannot override the accused's right to be presumed innocent, especially when there is evidence of procedural lapses.

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