Drug Bust Conviction Upheld: Chain of Custody and Informant Rules in Philippine Drug Cases

The Supreme Court's 2009 ruling in People v. Capco (G.R. No. 183088) provides important guidance on how Philippine courts treat drug evidence and police procedures in buy-bust operations. For anyone facing drug charges—or simply wanting to understand how these cases work—the decision clarifies three key points: confidential informants need not testify, minor deviations from the required inventory procedure do not automatically invalidate evidence, and the chain of custody can be proven even without every officer who handled the drugs taking the stand.

The Facts of the Case

In August 2003, operatives from the Makati City Anti-Illegal Drugs Special Operation Task Force conducted a buy-bust operation against Donato Capco based on a tip from a confidential informant. PO2 Barrameda, acting as poseur-buyer, purchased one plastic sachet containing 0.03 gram of shabu (methamphetamine hydrochloride) for P100 in marked money. After the sale, Capco was arrested and brought to the police station, then to the PNP Crime Laboratory. Both the seized substance and Capco's urine tested positive for shabu.

Capco was charged with illegal sale of dangerous drugs under Section 5, Article II of Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002) and use of dangerous drugs under Section 15. He pleaded guilty to the use charge but contested the sale charge. The trial court convicted him, and the Court of Appeals affirmed. The Supreme Court upheld the conviction.

The Issue: Informant's Non-Presentation

Capco argued that the prosecution's failure to present the confidential informant amounted to suppression of evidence. The Court rejected this argument, citing People v. Peñaflorida, Jr. (G.R. No. 175604, April 10, 2008).

The Court explained that an informant's testimony is not essential for conviction—it would merely be corroborative and cumulative. More importantly, informants are typically not presented as witnesses because their identities must be concealed to protect them from retaliation by drug syndicates. Their value to law enforcement depends on their safety.

The Issue: Non-Compliance with Section 21, RA 9165

Section 21(1) of RA 9165 requires that after seizure, the apprehending team must physically inventory and photograph the drugs in the presence of the accused (or his representative or counsel), a media representative, a DOJ representative, and an elected public official, all of whom must sign the inventory.

Capco argued that the police failed to follow this procedure—no physical inventory was conducted in his presence, and no photographs were taken. The Court, however, held that non-compliance with Section 21 does not automatically render seized items inadmissible. What matters most is the preservation of the integrity and evidentiary value of the seized items.

The Issue: Chain of Custody

Capco's final argument was that the prosecution failed to present every person who handled the seized drugs, casting doubt on the chain of custody. The Court disagreed.

The evidence showed that PO2 Barrameda marked the sachet with "DSC" immediately after the buy-bust. A letter-request was sent to the PNP Crime Laboratory, where Forensic Chemist Grace M. Eustaquio examined the specimen and issued Chemistry Report No. D-1049-03, confirming it was shabu. Both PO2 Barrameda and PO1 Santos identified the same specimen in court as the product of the buy-bust operation.

The Court emphasized that in prosecutions for illegal sale of drugs, what is material is proof that the sale actually took place, coupled with the presentation in court of the object evidence—the core of the corpus delicti. The integrity of evidence is presumed preserved unless there is a showing of bad faith, ill will, or tampering. Capco failed to overcome this presumption.

Practical Takeaways

• Informants are not indispensable witnesses. A conviction can stand even without the confidential informant testifying, as long as police officers present sufficient evidence of the transaction.
• Substantial compliance with Section 21 may suffice. Minor deviations from the inventory and photograph requirements do not automatically make evidence inadmissible, provided the integrity of the seized drugs is preserved.
• The chain of custody need not include every handler. The prosecution can establish an unbroken chain through testimony of key officers and the forensic chemist, even if not all personnel who touched the evidence testify.
• Presumptions favor law enforcement. Courts presume regularity in the performance of official duty and preservation of evidence integrity, unless the accused proves tampering or ill motive.
• Denial alone rarely defeats a buy-bust case. Uncorroborated denial cannot overcome the positive testimony of police officers, especially when the accused fails to show any motive for being falsely accused.

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