Reasonable Doubt and Chain of Custody: Safeguarding Rights in Drug Cases

In a significant ruling, the Supreme Court reversed the conviction of Edgardo Royol y Asico for illegal sale of marijuana, emphasizing that complete noncompliance with the chain of custody requirements under Republic Act No. 9165 (Comprehensive Dangerous Drugs Act) leads to acquittal. The case, People v. Royol (G.R. No. 224297, February 13, 2019), underscores that convictions cannot rest on a mere presumption of regularity or the approximation of compliance with statutory safeguards.

The Case: A Buy-Bust Operation Gone Wrong

On November 27, 2007, police officers conducted a buy-bust operation in Bamban, Tarlac, after a confidential informant reported that Royol, a garbage collector, was selling illegal drugs. PO2 Mark Anthony Baquiran acted as poseur-buyer and allegedly purchased half a brick of marijuana (500.28 grams) from Royol using two marked P500 bills.

Royol was arrested and charged with violation of Section 5 of RA 9165 for illegal sale of dangerous drugs. The Regional Trial Court convicted him, imposing life imprisonment and a fine of P500,000. The Court of Appeals affirmed. Royol appealed to the Supreme Court.

The Issue: Was Guilt Proven Beyond Reasonable Doubt?

The central question was whether the prosecution established Royol's guilt beyond reasonable doubt, particularly whether it properly preserved the integrity of the seized marijuana through compliance with Section 21's chain of custody requirements.

The Ruling: Noncompliance Means Acquittal

The Supreme Court acquitted Royol, finding the prosecution's case "woefully lacking." The Court noted that the police officers failed to conduct a physical inventory and photograph the seized items as required by Section 21(1) of RA 9165. The prosecution merely claimed the marijuana was marked at the police station, with no evidence that:

• The marking was done in Royol's presence or his representative's
• An elected public official was present
• A representative from the National Prosecution Service or media was present
• Any justifiable grounds existed for noncompliance

Why Strict Compliance Matters

The Court explained that Section 21 exists to protect the integrity and evidentiary value of seized drugs. As cited in People v. Holgado, compliance protects four aspects: the nature of the substance, its quantity, its relation to the incident, and its relation to the accused. Noncompliance "forecloses opportunities for planting, contaminating, or tampering of evidence."

The Court rejected the lower courts' reliance on the presumption of regularity in police officers' performance of official duties. Citing People v. Kamad, the presumption applies only when officers have shown compliance with "the standard conduct of official duty required by law"—it cannot justify dispensing with compliance.

The Burden on the Prosecution

The Court reiterated that the prosecution bears the burden of proving guilt beyond reasonable doubt, relying on the strength of its own evidence, not the weakness of the defense. As stated in Basilio v. People, the constitutional presumption of innocence requires moral certainty—not absolute certainty, but "that degree of proof which produces conviction in an unprejudiced mind."

Practical Takeaways

• Chain of custody is non-negotiable. Police must conduct physical inventory and photographing immediately after seizure, in the presence of the accused (or representative/counsel), an elected public official, and a representative of the National Prosecution Service or media.
• Mere marking is insufficient. The Court cited People v. Garcia and People v. Magat to show that even acts approximating compliance—like merely marking seized items—are inadequate.
• Justifiable grounds must be proven. If police deviate from Section 21 requirements, they must specifically allege and prove justifiable grounds and show positive steps taken to preserve the evidence's integrity.
• Presumption of regularity has limits. It cannot override explicit statutory requirements or cure flagrant procedural lapses.
• For accused persons: Noncompliance with chain of custody can be a strong defense, as it casts doubt on the identity and integrity of the alleged corpus delicti.

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