Chain of Custody in Drug Cases: Why Police Lapses Mean Acquittal

In a significant ruling, the Supreme Court acquitted an accused drug offender because the police buy-bust team failed to comply with the mandatory requirements of Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002. The case of People v. Briones (G.R. No. 239077, March 20, 2019) serves as a critical reminder that the presumption of innocence cannot be defeated by procedural lapses in handling seized drugs.

The Facts of the Case

On April 16, 2013, police officers in Batangas City conducted a buy-bust operation against Garry Briones, who was suspected of selling shabu. A police asset reportedly arranged to purchase drugs from Briones, and a poseur-buyer was assigned to complete the transaction. After the arrest, the seized plastic sachet was marked, photographed, and later tested positive for methamphetamine hydrochloride.

Briones was charged with illegal sale and delivery of dangerous drugs under Section 5, Article II of RA 9165. He was convicted by the Regional Trial Court and the Court of Appeals affirmed the conviction. Both lower courts held that the prosecution had sufficiently established his guilt.

The Issue Before the Supreme Court

The central question was whether Briones's guilt was proven beyond reasonable doubt, particularly given the police officers' failure to strictly comply with Section 21's chain of custody requirements.

The Ruling: Acquittal Due to Procedural Lapses

The Supreme Court reversed the conviction and acquitted Briones. The Court emphasized that in drug cases, the confiscated drug constitutes the corpus delicti—the very body of the crime. Its identity and integrity must be established with moral certainty through an unbroken chain of custody.

What Section 21 Requires

At the time of the alleged crime, Section 21 required the apprehending team to:

1. Immediately conduct a physical inventory and photograph the seized items after seizure or confiscation
2. Conduct the inventory in the presence of the accused or his representative, an elected public official, a media representative, and a DOJ representative
3. Have all witnesses sign the inventory and receive copies

The Court stressed that these witnesses should be present at the time and place of seizure—not called in afterward. A buy-bust operation is a planned activity, and police teams have sufficient time to secure the required witnesses beforehand.

The Police Lapses in This Case

The buy-bust team failed to comply with these requirements. The police only attempted to contact the mandatory witnesses after the arrest, while already at the barangay hall. Only a DOJ representative and a barangay official arrived; no media representative appeared, and the police offered no sufficient explanation for this absence.

The Court found this particularly inexcusable because:

• Briones had been under surveillance and on the watch list since 2010
• The informant tipped off police at 10:00 a.m., but the team only left the station at 11:15 a.m.
• The team had coordinated with barangay officials before the operation

The police had more than enough time to gather the required witnesses. Their belated efforts defeated the very purpose of the law—to prevent the planting of evidence.

Presumption of Innocence vs. Presumption of Regularity

The prosecution relied on the presumption of regularity in the performance of official duty. The Court rejected this argument, holding that the police lapses themselves were affirmative proofs of irregularity. The presumption of regularity cannot overcome the stronger, constitutionally protected presumption of innocence. A mere rule of evidence cannot defeat a constitutional right.

The Court reiterated that when there is non-compliance with Section 21, the prosecution must prove: (a) a justifiable ground for the non-compliance, and (b) that the integrity and evidentiary value of the seized items were properly preserved. In this case, the prosecution offered no justifiable explanation.

Practical Takeaways

• Chain of custody is not optional. Police must strictly follow Section 21 of RA 9165, including immediate inventory and photographing at the place of seizure with the required witnesses present.
• Buy-bust teams must prepare. Because buy-bust operations are planned, police have no excuse for failing to secure the presence of the mandatory witnesses beforehand.
• Presumption of innocence prevails. The presumption of regularity in official duty cannot defeat the constitutional presumption of innocence, especially when procedural lapses are evident.
• Prosecution bears the burden. The prosecution must prove compliance with Section 21 or provide a sufficient, factual explanation for any deviation. Unexplained lapses can lead to acquittal.
• For the accused, procedural lapses matter. Defense counsel should always examine whether the chain of custody was properly documented and whether the required witnesses were present.

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