Upholding Buy-Bust Operations When Minor Deviations Don't Nullify Drug Convictions

The Supreme Court has consistently held that police officers need not follow a rigid checklist in every drug operation. In People v. Villahermoso (G.R. No. 218208, January 24, 2018), the Court affirmed a conviction for illegal sale of dangerous drugs despite the accused's claims of procedural lapses. The ruling clarifies that minor deviations—such as marking evidence at the police station instead of the arrest scene—do not automatically invalidate a conviction when the integrity of the seized drugs remains intact.

Facts of the Case

On October 12, 2006, a buy-bust team in Cebu City, coordinated with the Philippine Drug Enforcement Agency, targeted Brian Villahermoso for selling shabu. A poseur-buyer, PO2 Joseph Villaester, was introduced to Villahermoso by a civilian informant. After Villahermoso handed over two sachets of suspected shabu worth P32,000.00, the poseur-buyer gave the pre-arranged signal, and the team arrested him.

The seized sachets were marked "BV-01" and "BV-02" at the police station, not at the scene. They were then submitted to the crime laboratory, where Chemistry Report No. D-1632-2006 confirmed the substance was methamphetamine hydrochloride.

Villahermoso denied the charge, claiming he was merely collecting payment for mangoes when he was accosted. He argued that the police failed to conduct prior surveillance and violated the Chain of Custody Rule because the items were not properly marked, inventoried, and photographed at the scene.

The Issue

The central question was whether the police's failure to strictly comply with the Chain of Custody Rule—specifically the delayed marking and absence of inventory and photographs—warranted acquittal.

The Court's Ruling

The Supreme Court dismissed the appeal and affirmed the conviction for violation of Section 5, Article II of Republic Act No. 9165, imposing life imprisonment and a fine of P500,000.00.

Prior surveillance is not mandatory. The Court reiterated that prior surveillance is not a prerequisite for a valid entrapment operation, especially when the buy-bust team is accompanied by an informant who introduces the poseur-buyer to the suspect.

Substantial compliance with the Chain of Custody Rule suffices. Recognizing the practical difficulties of perfect compliance, the Court held that substantial compliance is enough as long as the integrity and evidentiary value of the seized items are preserved.

Delayed marking was justified. The Court approved the Court of Appeals' finding that marking at the police station was justified because the accused was struggling and resisting arrest. The arresting officers' priority was to subdue the offender, making on-site marking difficult, if not impossible.

Absence of inventory and photographs is not fatal. The Court noted that convictions have been affirmed despite non-compliance with these requirements, provided the identity and integrity of the corpus delicti are preserved. Here, the prosecution established a clear chain: the sachets were marked at the station, delivered to the crime laboratory the same day, and tested positive for shabu.

Practical Takeaways

• Buy-bust operations remain valid without prior surveillance, particularly when an informant accompanies the team and introduces the poseur-buyer to the suspect.
• Police officers have discretion in the timing and place of marking seized items, especially when the suspect is resisting arrest and the scene is unsafe.
• The absence of a physical inventory or photographs does not automatically result in acquittal, provided the prosecution can show the integrity of the seized drugs was preserved.
• A clear chain of custody—from seizure to marking to laboratory examination to court presentation—remains the cornerstone of a successful drug prosecution.
• Accused persons who resist arrest may inadvertently justify procedural deviations, as their conduct can explain why officers departed from ideal procedures.

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