Ensuring Integrity: The Critical Role of Chain of Custody in Drug Offense Cases

In a significant ruling, the Supreme Court reversed the conviction of a man accused of illegal sale of drugs, emphasizing that the prosecution's failure to strictly comply with the chain of custody rule under Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002) warrants acquittal. The case of People v. Deliña y Lim (G.R. No. 243578, June 30, 2020) serves as a stark reminder that in drug cases, the integrity of the seized substance is as crucial as the act of seizure itself.

The Case: A Buy-Bust Operation Gone Wrong

Bryan Deliña was arrested in April 2014 after a buy-bust operation in Calatrava, Negros Occidental. A confidential asset allegedly purchased two sachets of shabu (methamphetamine hydrochloride) worth P400.00 from Deliña. The police officers, positioned about eight to ten meters away, rushed in and arrested him. The seized sachets were later marked, inventoried at the police station, and submitted to the crime laboratory, which confirmed they contained dangerous drugs.

Both the Regional Trial Court and the Court of Appeals convicted Deliña, relying on the presumption of regularity in the performance of official duties by the police. However, the Supreme Court found merit in Deliña's appeal and acquitted him.

The Core Issue: Proving the Corpus Delicti

The Court reiterated that in prosecutions for illegal sale of dangerous drugs under Section 5, Article II of RA 9165, the prosecution must prove not only the elements of the sale but also the corpus delicti—the body of the crime. The confiscated drug itself is the corpus delicti, and its identity and integrity must be established with moral certainty. This means the substance seized from the accused must be the very same substance presented in court as evidence.

To ensure this, law enforcement officers must strictly comply with the chain of custody rule under Section 21 of RA 9165. This provision requires that the seized items be physically inventoried and photographed immediately after seizure, in the presence of the accused or their representative, an elected public official, a representative from the media, and a representative from the Department of Justice.

The Lapses That Led to Acquittal

The Supreme Court identified several critical lapses in the police's handling of the evidence that collectively compromised its integrity:

1. Failure to Mark Immediately. The police did not mark the confiscated sachets immediately after seizure. The Court emphasized that marking is the "stalling point" in the custodial link—it separates the evidence from all other similar items and prevents switching, planting, or contamination.

2. Inventory Not at the Place of Arrest. The physical inventory and photographing were done at the police station, not at the place of arrest. While this may be permissible when not practicable, the prosecution failed to provide any justification for the deviation. The Court stressed that the presence of the required witnesses must be secured not only during inventory but more importantly at the time of the warrantless arrest.

3. Unbroken Chain Not Established. Only two officers testified about the handling of the drugs, yet the evidence passed through at least four pairs of hands. The Court noted that every person who touched the seized item must describe how and from whom they received it, its condition, and what happened to it while in their possession. The prosecution failed to present key witnesses, including the officer who obtained the sachets and the evidence custodian.

4. Absence of the Poseur-Buyer. The confidential asset who acted as the poseur-buyer was never presented in court. Since the police officers were eight to ten meters away, they could not be considered eyewitnesses to the actual sale. Their testimony was based on conjecture or hearsay. The Court held that the non-presentation of the poseur-buyer is fatal unless there is another competent eyewitness to the transaction.

Practical Takeaways

• Strict compliance is the rule. Police must follow Section 21 of RA 9165 meticulously—marking, inventory, and photographing must be done immediately, with the required witnesses present.
• Justifiable grounds must be proven. If there is a deviation from the procedure, the prosecution must present concrete evidence of justifiable grounds and show that the integrity of the evidence was preserved.
• Every link in the chain must testify. The prosecution must present all persons who handled the seized item to establish an unbroken chain of custody.
• The poseur-buyer's testimony is vital. In a buy-bust operation, the poseur-buyer is often the primary witness to the sale. Their absence can be fatal to the case unless other eyewitnesses can testify on the transaction.
• Presumption of regularity is not enough. The presumption of regularity in the performance of official duties cannot overcome the prosecution's failure to prove the integrity of the corpus delicti.

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