Imperfect Chain of Custody Leads to Acquittal in Drug Cases

In drug cases, the prosecution must do more than prove that the accused sold or possessed illegal drugs. It must also prove that the drugs presented in court are the very same items seized from the accused. This rule, known as the chain of custody requirement, is designed to prevent the planting of evidence and to protect the innocent. In People v. Maneclang (G.R. No. 230337, June 17, 2019), the Supreme Court showed how seriously it takes this requirement by acquitting an accused despite the police officers' testimony against her.

The Facts of the Case

On July 2, 2011, police officers in Manila conducted a buy-bust operation against a certain "Muslim" who was reportedly selling illegal drugs. PO2 Mario Anthony Aresta acted as the poseur-buyer. When the team arrived at the target area, the confidential informant approached the accused, Jocelyn Maneclang, and asked about "Muslim." Maneclang said he was not around but offered that she had "item" for sale. She then sold one plastic sachet of shabu to PO2 Aresta for Php 300.

After the sale, the back-up team rushed in and arrested Maneclang. A search of her pockets yielded four more sachets of shabu and the buy-bust money. The police marked the five sachets at the place of arrest and took photographs. However, no inventory was conducted at the scene because a commotion broke out. The inventory was instead made later at the police station, without the presence of any elected official, media representative, or DOJ representative. The forensic chemist who tested the drugs was not presented in court; his testimony was merely stipulated upon.

The Issue

The central issue was whether the prosecution had established an unbroken chain of custody over the seized drugs, as required by Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002.

The Ruling: Valid Arrest, Broken Chain

The Supreme Court first ruled that the warrantless arrest was valid. Maneclang was caught in flagrante delicto—she sold drugs in the presence of the poseur-buyer. Under Section 5(a), Rule 113 of the Revised Rules of Criminal Procedure, a peace officer may arrest a person without a warrant when the person has just committed, is actually committing, or is attempting to commit an offense in the officer's presence. The fact that Maneclang was not the original target of the buy-bust did not matter.

However, the Court found that the prosecution failed to establish the chain of custody. Section 21(1) of RA 9165, as it stood before its amendment by RA 10640, required the apprehending team to physically inventory and photograph the seized drugs immediately after seizure in the presence of the accused or her representative, a media representative, a DOJ representative, and an elected public official.

In this case, no inventory was made at the place of arrest. The inventory at the police station was done without any of the required insulating witnesses. While a barangay kagawad arrived during the inventory, he did not sign it and actually questioned the propriety of the operation. The police officer claimed that the team could not procure witnesses because it was nighttime, but the Court found this excuse unacceptable. There was no evidence of genuine, earnest efforts to secure the attendance of the required witnesses.

The Court also noted a gap in the chain of custody at the forensic laboratory. The forensic chemist did not sign the Request for Laboratory Examination, and his testimony was dispensed with through a stipulation that covered only the results of the examination—not the source of the substance. The prosecution did not establish that the chemist actually received the seized drugs from the arresting officer.

Why This Matters

The Court emphasized that while non-compliance with Section 21 will not automatically invalidate the seizure, the prosecution must show that honest-to-goodness efforts were made to comply. Mere allegations of unavailability, without proof of actual attempts, are not enough. The presumption of regularity in the performance of official duty cannot arise when the police have clearly breached mandatory procedures.

Practical Takeaways

• The chain of custody is the heart of a drug case. Without it, the prosecution cannot prove that the drugs offered in court are the same items seized from the accused.
• The insulating witnesses are not optional. The presence of an elected official, a media representative, and a DOJ representative during the inventory is mandatory. Their absence must be justified by genuine, documented efforts to secure their attendance.
• A valid arrest does not guarantee a conviction. Even if the warrantless arrest is lawful, the prosecution must still independently prove the identity and integrity of the seized drugs.
• Stipulations must be carefully worded. When the prosecution dispenses with a witness's testimony, the stipulation must cover all essential elements, including the handling of the evidence, not just the laboratory results.
• Police officers should document every step. Marking, inventory, turnover, and laboratory receipt should all be recorded with signatures to avoid creating gaps in the chain.

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