Chain of Custody in Drug Cases: When Non-Compliance with RA 9165 Is Not Fatal

In drug cases, the prosecution's success often hinges on one thing: proving that the seized items are exactly what the police say they are. The rules on chain of custody under Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002) exist to protect that link. But what happens when the police skip a step? In People v. Pringas (G.R. No. 175928, August 31, 2007), the Supreme Court clarified that not every lapse is fatal—and that an accused who stays silent at trial cannot raise the issue for the first time on appeal.

The Facts of the Case

On April 22, 2003, police officers in Pasig City conducted a buy-bust operation against Alvin Pringas. A poseur-buyer handed P100 to Pringas, who returned with a plastic sachet of what later tested positive as methamphetamine hydrochloride, or shabu. When the team moved to arrest him, they found three more sachets of shabu and assorted drug paraphernalia on a small chair inside his house.

Pringas was charged with illegal sale of drugs (Section 5), illegal possession of drugs (Section 11), and illegal possession of drug paraphernalia (Section 12) under RA 9165. He denied the buy-bust ever happened, claiming police barged into his home without a warrant. The trial court convicted him on all three counts; the Court of Appeals affirmed. He appealed to the Supreme Court.

The Issue Raised on Appeal

Pringas argued that the police violated Section 21 of RA 9165 by failing to immediately photograph the seized items and conduct an inventory in the presence of the accused, a media representative, a DOJ representative, and an elected public official. He also claimed the operation violated Section 86 because it was conducted without the involvement of the Philippine Drug Enforcement Agency (PDEA). Because of these lapses, he argued, the evidence should have been inadmissible.

The Court's Ruling

The Supreme Court rejected both arguments and affirmed the conviction.

On the PDEA issue. Section 86 of RA 9165 is an administrative provision that designates the PDEA as the "lead agency" in drug law enforcement. It does not strip the PNP or NBI of authority to conduct anti-drug operations. Citing People v. Sta. Maria, the Court held that nothing in the law suggests an arrest made without PDEA participation is illegal, or that evidence obtained from such an arrest is inadmissible. The PNP retains the power to make lawful arrests.

On the Section 21 issue. The Court acknowledged the requirement to photograph and inventory seized items in the presence of specified witnesses. But it also noted the rule's own qualification: non-compliance is not fatal as long as there is a justifiable ground and the integrity and evidentiary value of the seized items are preserved.

More importantly, the Court pointed out that Pringas never questioned the custody and disposition of the seized items during trial. He raised the issue only on appeal. This, the Court said, he cannot do. Objections to evidence must be made at the time the evidence is offered; they cannot be raised for the first time on appeal.

Why the Conviction Stood

The Court found that the integrity of the evidence was properly preserved. The seized items were immediately marked for identification and forwarded to the Crime Laboratory for examination. The prosecution witnesses—the poseur-buyer and the team leader—testified consistently about how the buy-bust unfolded, and their accounts were found credible.

Against this, Pringas's bare denial, unsubstantiated by any credible evidence, failed. The Court also noted he failed to present the neighbors he claimed witnessed the alleged illegal entry.

Practical Takeaways

• Object early. A defendant who fails to question the chain of custody during trial cannot raise it for the first time on appeal. The objection must be made when the evidence is offered.
• Non-compliance is not automatic acquittal. A lapse in the inventory or photograph requirements of Section 21 will not automatically render seized drugs inadmissible, provided there is a justifiable ground and the integrity of the items is preserved.
• The PNP can still conduct drug operations. Section 86 of RA 9165 makes the PDEA the lead agency, but it does not remove the police's power to make lawful arrests in drug cases.
• Preservation of integrity is the core test. What ultimately matters is whether the seized items presented in court are the same items seized from the accused, untainted and unaltered.
• Credibility of police witnesses matters. Absent clear and convincing evidence of improper motive, the testimonies of buy-bust team members are given full faith and credit.

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