Chain of Custody Breach Leads to Acquittal in Drug Sale Case

The Supreme Court has repeatedly warned that in drug cases under Republic Act No. 9165, the prosecution must prove not only that the accused sold or possessed illegal drugs, but also that the very item seized is the same item presented in court. In People v. Sembrano (G.R. No. 238829, October 15, 2018), the Court showed how strictly it enforces this rule by acquitting an accused when police officers photographed the wrong evidence during the inventory.

The Facts of the Case

On December 13, 2011, operatives of the Baguio City Anti-Illegal Drugs – Special Operation Task Group conducted a test-buy operation against Concepcion Sembrano y Cruz. A confidential informant purchased a plastic sachet of suspected shabu for P5,000.00, which was marked "GBB" by PO2 Geoffrey Bantule. The item tested positive for methamphetamine hydrochloride.

Hours later, the same team conducted a buy-bust operation. The poseur-buyer, SPO1 Reynaldo Badua, purchased another sachet for P7,000.00, marking it with his initials "RCB." An inventory and photography were conducted in the presence of required witnesses. Both the Regional Trial Court and the Court of Appeals convicted Sembrano of illegal sale of dangerous drugs, sentencing her to life imprisonment and a P5,000,000.00 fine.

The Issue Before the Supreme Court

The central question was whether the prosecution had sufficiently established the identity and integrity of the seized drugs — the corpus delicti — to support a conviction beyond reasonable doubt.

The Court's Ruling: Acquittal

The Supreme Court reversed the conviction and acquitted Sembrano. The Court emphasized that in drug cases, the dangerous drug itself is the corpus delicti. The prosecution must account for every link in the chain of custody — from seizure, to marking, inventory, photography, laboratory examination, and finally presentation in court.

The Court found a fatal flaw in the prosecution's evidence. The photographs taken during the inventory showed the plastic sachet marked "GBB" — the item from the test-buy operation — instead of the "RCB"-marked sachet supposedly seized from the buy-bust operation. When cross-examined, SPO1 Badua admitted the mistake, saying a colleague "committed a mistake in giving the picture." He became evasive when asked to produce the correct photograph, suggesting the defense subpoena his office instead.

Why the Mistake Was Fatal

The Court stressed that the inventory and photography requirements exist precisely to ensure that the drugs seized from the accused are the same drugs for which he or she is charged. Any discrepancy must be reasonably explained. Here, the prosecution failed to explain why the wrong sachet was photographed, and the poseur-buyer's shifting testimony only deepened the doubt.

The Court reiterated that compliance with the chain of custody rule is not merely a procedural technicality but a matter of substantive law. The law itself — Section 21 of Republic Act No. 9165, as amended — sets out the custody and disposition requirements for confiscated drugs. While the exact text of the provision is not reproduced in the library consulted, the Court in Sembrano applied the rule that non-compliance may be excused only under justifiable grounds, provided the integrity and evidentiary value of the seized items are properly preserved. The prosecution must prove these justifiable grounds as facts; the Court cannot presume their existence. As emphasized in People v. Miranda, the State has a positive duty to account for lapses in the chain of custody, even if the defense does not raise them at trial.

Practical Takeaways

• Photograph the right evidence. The inventory photographs must depict the exact items seized from the accused in the specific operation charged. Photographing evidence from a separate operation breaks the chain of custody.
• Explain discrepancies immediately. If a procedural lapse occurs, the prosecution must present a justifiable explanation as a proven fact — not rely on the Court to assume one exists.
• Witness testimony matters. The poseur-buyer's admission of the mistake and his evasive answers on cross-examination were decisive. Inconsistent testimony can destroy the integrity of the evidence.
• Chain of custody is substantive law. Courts treat compliance as a safeguard against police abuse, especially where the penalty is life imprisonment. Lapses are not mere technicalities.
• For the defense, scrutinize the photos. Comparing the markings on the sachets in the photographs against the markings on the items offered in evidence can expose fatal gaps in the prosecution's case.

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