Broken Chains: Acquittal Due to Flawed Drug Evidence Handling

The Supreme Court has repeatedly stressed that in drug cases, the prosecution must prove not only that a sale took place, but also that the seized drugs presented in court are the very same items recovered from the accused. This second requirement—known as the chain of custody rule—is what broke the prosecution's case in People v. Vinluan (G.R. No. 232336, February 28, 2022), where the Court acquitted an accused because police officers failed to secure the required witnesses during the inventory of seized marijuana.

The Facts of the Case

On December 3, 2013, police in Bambang, Nueva Vizcaya conducted a buy-bust operation against Marnel Vinluan y Liclican after a confidential informant reported that he was selling marijuana. PO1 Marlon Cammayo acted as poseur-buyer and purchased four plastic sachets of dried marijuana from Vinluan for P500.00. After the exchange, Vinluan was arrested.

The seized items were marked at the scene in Vinluan's presence. An inventory was then prepared, witnessed only by two barangay kagawads. No representative from the media or the Department of Justice (DOJ) was present. The items tested positive for marijuana, and Vinluan was charged with Illegal Sale of Dangerous Drugs under Section 5, Article II of Republic Act No. 9165.

The Issue

The sole issue on appeal was whether Vinluan's conviction was proper. The Regional Trial Court and the Court of Appeals both convicted him, relying heavily on the presumption of regularity in the performance of police duties and finding that the chain of custody was substantially complied with. The Supreme Court disagreed.

The Chain of Custody Rule Under Section 21

Section 21 of RA 9165 requires that immediately after seizure, the apprehending team must conduct a physical inventory and photograph the seized drugs in the presence of:

1. The accused or his representative or counsel;
2. A representative from the media;
3. A representative from the DOJ; and
4. Any elected public official.

These witnesses are required to sign the inventory and receive a copy. The Supreme Court in People v. Baluyot explained that this requirement protects against frame-ups and the planting of evidence. The presence of the three witnesses—media, DOJ, and an elected official—is a safeguard for the accused.

The Saving Clause and Its Limits

The law allows for non-compliance with these requirements under "justifiable grounds," provided that the integrity and evidentiary value of the seized items are preserved. However, the Court in Vinluan clarified that for this saving clause to apply, the prosecution must:

1. Recognize the procedural lapse;
2. Explain the justifiable ground for non-compliance; and
3. Show that the integrity and evidentiary value of the seized items were preserved.

Mere statements of unavailability are not enough. The police typically have sufficient time—from receiving the tip to the actual arrest—to prepare for the buy-bust, including securing the required witnesses.

Why the Conviction Fell

Here, only two barangay kagawads witnessed the inventory. No media or DOJ representative was present. The prosecution never attempted to justify this absence. There was no showing that the police exerted earnest efforts to secure the other required witnesses. Because the prosecution failed to acknowledge the lapse, the saving clause could not apply.

The Court held that this unjustified non-compliance created a gap in the chain of custody that adversely affected the integrity and evidentiary value of the seized drugs. Without establishing the identity of the corpus delicti, the prosecution failed to prove guilt beyond reasonable doubt. Vinluan was acquitted.

Practical Takeaways

• Witnesses matter. In every buy-bust operation, police must secure a media representative, a DOJ representative, and an elected public official for the inventory and photographing of seized drugs.
• The saving clause is not automatic. Prosecutors cannot rely on it unless they first acknowledge the lapse, explain the justification, and prove the drugs' integrity was preserved.
• Presumption of regularity is not a shield. The presumption of regularity in police duty cannot override the mandatory requirements of Section 21 when the prosecution fails to address known deviations.
• For defense counsel: Scrutinize the inventory report and testimonies for missing witnesses and unexplained gaps—these can be the basis for acquittal.
• For accused persons: The failure of police to follow the chain of custody rule can be a powerful defense, even where the sale itself appears proven.

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