Buy-Bust Operations and the Chain of Custody: Safeguarding Drug Evidence in the Philippines

In a significant ruling on drug evidence, the Supreme Court acquitted a woman charged with illegal sale of shabu because the prosecution failed to establish the chain of custody of the seized drugs. The case of People v. Andongan (G.R. No. 184595, June 29, 2010) reminds law enforcers and prosecutors that in drug cases, the integrity of the evidence is just as important as the arrest itself.

The Facts of the Case

On June 25, 2004, police officers conducted a buy-bust operation against Sapia Andongan in Manila. A poseur-buyer handed her a marked P500 bill, and she allegedly gave him a plastic sachet containing 0.146 grams of white crystalline substance later found to be shabu. She was arrested and charged with violation of Section 5, Article II of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002.

The trial court convicted her, and the Court of Appeals affirmed. On appeal, the Supreme Court reversed the conviction and acquitted her.

The Issue: Was the Chain of Custody Properly Established?

The central question was whether the prosecution proved that the substance seized from the accused was the same substance examined in the laboratory and offered in court. The chain of custody rule requires that every person who handled the evidence must testify on how and from whom it was received, what happened to it while in their possession, and how it was transferred to the next link.

In this case, the prosecution's sole witness, the poseur-buyer, testified that he marked the sachet with the initials "SSA" only after bringing the accused to the police station. However, there was no testimony showing what happened to the sachet from the moment of seizure until it was marked, nor was there evidence that the marked sachet was the same one submitted to the crime laboratory for examination.

The Court's Ruling: Gaps in Evidence Favor the Accused

The Supreme Court held that the evidentiary gap was fatal to the prosecution's case. The Court noted that without proof of every link in the chain, the prosecution cannot establish that the evidence presented in court is the same item seized from the accused.

The Court also observed that the buy-bust team failed to comply with Section 21, Article II of R.A. No. 9165, which requires that seized drugs be physically inventoried and photographed immediately after seizure in the presence of the accused or her representative, a media representative, a Department of Justice representative, and an elected public official.

The Presumption of Regularity Cannot Overcome Doubt

The prosecution relied on the presumption of regularity in the performance of official duty by police officers. However, the Court ruled that this presumption cannot stand alone to overcome the constitutional presumption of innocence. Citing People v. Santos, the Court emphasized that the presumption of regularity cannot constitute proof beyond reasonable doubt.

The Court further found the circumstances of the arrest suspicious. It found it incredible that an alleged drug peddler would be standing openly on a street corner at 7:50 in the evening with only one small sachet of shabu worth exactly the amount the poseur-buyer wanted to purchase.

Practical Takeaways

• Chain of custody is mandatory in drug cases. Every person who handles seized drugs must testify on their receipt and transfer of the evidence, from seizure to laboratory examination to court presentation.
• Marking must be done immediately. Police officers should mark seized items at the scene of the arrest, not later at the station, to avoid doubts about the evidence's identity.
• Comply with Section 21 of R.A. No. 9165. The required physical inventory and photographing of seized drugs, done in the presence of the specified witnesses, is a procedural safeguard that courts take seriously.
• The presumption of regularity is not a substitute for evidence. Prosecutors cannot rely on the good faith of police officers to fill gaps in the chain of custody.
• For the accused, gaps in the evidence can lead to acquittal. Where the prosecution fails to prove the identity and integrity of the seized drugs beyond reasonable doubt, the accused is entitled to acquittal.

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