Reasonable Doubt and the Chain of Custody Rule in Drug Cases

The presumption of innocence is a cornerstone of Philippine criminal procedure, and it becomes especially critical in drug cases where the prosecution's evidence must stand on its own. In People v. Bahoyo (G.R. No. 238589, June 26, 2019), the Supreme Court reversed a conviction for illegal sale and possession of shabu because the police failed to comply with the mandatory witness requirements during the inventory of seized drugs. The ruling is a reminder that procedural safeguards exist to protect the integrity of evidence—and that shortcuts by law enforcement can lead to acquittal.

The Facts of the Case

Allen Bahoyo was arrested in Makati City on July 17, 2016, during a buy-bust operation. Police officers allegedly caught him selling one plastic sachet of shabu for P500 and later recovered three more sachets from his possession. He was charged with violations of Sections 5 and 11, Article II of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002.

During the inventory of the seized drugs at the police station, only one witness was present—a media representative from a tabloid. No elected public official and no representative from the Department of Justice (DOJ) or the National Prosecution Service attended. The trial court convicted Bahoyo, and the Court of Appeals affirmed. On appeal, the Supreme Court acquitted him.

The Issue: Was the Chain of Custody Broken?

The central question was whether the prosecution had proven the identity of the seized drugs beyond reasonable doubt. Under the law, the dangerous drugs themselves form the corpus delicti of the offense. The prosecution must show an unbroken chain of custody—from seizure to presentation in court—to rule out switching, planting, or contamination of evidence.

Section 21 of R.A. No. 9165, as amended by R.A. No. 10640, requires that the physical inventory and photographing of seized drugs be conducted in the presence of:

• the accused or his representative or counsel;
• an elected public official; and
• a representative of the National Prosecution Service or the media.

These witnesses must sign the inventory and receive a copy. The presence of an elected public official remains indispensable even after the amendment reduced the number of witnesses from three to two.

The Ruling: Unjustified Lapses Cannot Be Excused

The Supreme Court held that the arresting officers failed to justify the absence of the required witnesses. The prosecution did not allege or prove any earnest effort to secure their attendance. The lone media representative's presence was not enough.

The Court rejected the argument that the "saving clause" in Section 21—which allows non-compliance under justifiable grounds—could excuse the lapse. Before that clause applies, the prosecution must prove two things: that there was a justifiable ground for non-compliance, and that the officers exerted their best efforts to comply but were thwarted by circumstances beyond their control.

The Court also noted that the presumption of regularity in the performance of official duties cannot save a case where police officers have shown a clear and unjustified disregard of procedural safeguards. As the Court explained in People v. Umipang, a gross, systematic, or deliberate disregard of procedure effectively creates an irregularity in official duty, generating serious doubt about the identity of the seized items.

Why This Matters

The ruling underscores that the prosecution must rely on the strength of its own evidence, not the weakness of the defense. In drug cases, the chain of custody is not a mere technicality—it is the safeguard that ensures the drugs presented in court are the same ones seized from the accused. When police fail to comply with Section 21 without justification, the resulting doubt must be resolved in favor of the accused.

Practical Takeaways

• Police must secure the required witnesses at the inventory stage. An elected public official and a representative from the media or the National Prosecution Service must be present, sign the inventory, and receive copies.
• The saving clause is not automatic. Non-compliance with Section 21 will only be excused if the prosecution proves justifiable grounds and shows earnest efforts to comply.
• The presumption of regularity cannot cure procedural lapses. A gross disregard of the law's safeguards defeats the presumption and raises reasonable doubt.
• For accused persons and their counsel, scrutinize the chain of custody carefully. Gaps in the procedure—especially the absence of required witnesses—can be a strong ground for acquittal.
• The burden is on the prosecution. The State must prove guilt beyond reasonable doubt, and any substantial gap in the chain of custody weakens its case.

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