Chain of Custody in Drug Cases: Why Procedural Lapses Lead to Acquittal

In drug cases, the prosecution must prove not only that the accused sold or possessed illegal drugs, but also that the very item presented in court is the same one seized from the accused. This is the essence of the chain of custody rule. In People v. Buniel (G.R. No. 243796, September 8, 2020), the Supreme Court acquitted an accused because police officers failed to follow the mandatory procedures under Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002.

The case underscores a crucial principle: even when a buy-bust operation appears successful, procedural lapses in handling the seized drugs can destroy the prosecution's case.

The Facts of the Case

On May 30, 2012, police officers in Manila conducted a buy-bust operation against a certain "Weng," later identified as Rowena Buniel. A poseur-buyer purchased one sachet of shabu for P1,000. After the sale, police also recovered another sachet from Buniel's companion. The officers brought the suspects and the seized items to the police station because it was raining.

At the station, the marking and inventory of the seized sachets were conducted. However, only one witness—a media representative who was also a barangay kagawad—was present. No representative from the Department of Justice (DOJ) and no elected public official attended the inventory. The police officers did not explain their absence.

The Issue

The central question was whether the prosecution had established an unbroken chain of custody of the seized drugs. The accused-appellant argued that the police failed to comply with Section 21 of RA 9165, which requires the physical inventory and photographing of seized items in the presence of the accused and three insulating witnesses: a media representative, a DOJ representative, and an elected public official.

The Ruling: Acquittal

The Supreme Court reversed the conviction and acquitted Buniel. The Court held that the prosecution failed to prove the identity of the corpus delicti—the dangerous drug itself—beyond reasonable doubt.

While the Court acknowledged that non-compliance with Section 21 does not automatically invalidate a seizure, the prosecution must prove two things: (1) there was a justifiable ground for the non-compliance, and (2) the integrity and evidentiary value of the seized items were properly preserved.

In this case, neither requirement was met. The police did not explain why the DOJ representative and an elected public official were absent. There was no showing of earnest efforts to secure their attendance. The Court cited People v. Ramos, which held that "mere statements of unavailability, absent actual serious attempts to contact the required witnesses, are unacceptable as justified grounds for noncompliance."

Gaps in the Chain

The Court also found a critical gap in the chain of custody. The prosecution claimed that forensic chemist PCI Reyes received the specimens from PO3 Bernabe. However, the records showed that a certain "PO2 J Rodriguez" received the request for laboratory examination. The stipulated testimony of the forensic chemist did not explain how the items were transferred from Rodriguez to Reyes, or what happened to them after examination and before they were presented in court.

The Court emphasized that every person who handles the seized item must describe how and from whom it was received, where it was kept, and what happened to it while in their possession. The prosecution failed to account for these links.

The Presumption of Regularity

The Court also rejected the prosecution's reliance on the presumption of regularity in the performance of official duty. This presumption applies only when nothing in the record suggests that law enforcers deviated from standard procedure. Once a taint of irregularity appears, the presumption becomes unavailable and cannot overcome the constitutional presumption of innocence.

Practical Takeaways

• Comply strictly with Section 21. Police officers must conduct the physical inventory and photographing of seized drugs immediately after seizure, in the presence of the accused and the required witnesses: a media representative, a DOJ representative, and an elected public official.
• Document earnest efforts. If a required witness is absent, the prosecution must prove that genuine efforts were made to secure their attendance. A bare statement that witnesses were unavailable is not enough.
• Account for every link in the chain. The prosecution must show the continuous whereabouts of the seized item from seizure to presentation in court. Every person who handled the item must testify on how they received it, what they did with it, and how they transferred it.
• Stipulations must be complete. When parties stipulate on the testimony of a forensic chemist, the stipulation should cover the precautionary steps taken to preserve the integrity of the seized item—that it was received sealed and intact, resealed after examination, and properly marked.
• Presumption of regularity is not automatic. Once irregularities appear in the police procedure, the presumption of regularity cannot be invoked to save the prosecution's case.

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