Chain of Custody in Drug Cases: When Police Lapses Lead to Acquittal

In a significant ruling for criminal procedure, the Supreme Court acquitted Manuel Gamboa y Francisco of illegal sale and possession of dangerous drugs because the police failed to justify their non-compliance with the witness requirement during the inventory of seized items. The case, People v. Gamboa (G.R. No. 233702, June 20, 2018), underscores that the prosecution must prove not only the elements of the crime but also the integrity of the seized drugs from seizure to courtroom presentation.

The Facts of the Case

On January 31, 2014, police conducted a buy-bust operation against Gamboa in Tondo, Manila, after receiving information about his alleged drug-selling activities. PO2 Richard Nieva acted as the poseur-buyer and purchased P200.00 worth of shabu from Gamboa. After the arrest, a preventive search yielded another sachet of the same substance. The seized items were marked and inventoried at the place of arrest, but only in the presence of Gamboa and a media representative. No elected public official or Department of Justice (DOJ) representative was present.

The Regional Trial Court convicted Gamboa, and the Court of Appeals affirmed. Both courts held that the absence of the other witnesses was not fatal because the police had sought the presence of a media man.

The Issue

The central question was whether the Court of Appeals correctly upheld Gamboa's conviction despite the police officers' failure to comply with the witness requirement under Section 21, Article II of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002.

The Ruling: Strict Compliance Matters

The Supreme Court reversed the conviction and acquitted Gamboa. The Court ruled that the police committed unjustified deviations from the prescribed chain of custody rule, compromising the integrity and evidentiary value of the seized items.

Under Section 21, Article II of RA 9165, as it stood before its amendment by RA 10640, the apprehending team was required to conduct a physical inventory and photograph the seized items in the presence of: (1) the accused or his representative or counsel; (2) a representative from the media; (3) a representative from the DOJ; and (4) any elected public official.

While the Court acknowledged that strict compliance may not always be possible under varied field conditions, the prosecution must prove two things for the saving clause to apply: (a) there was a justifiable ground for non-compliance, and (b) the integrity and evidentiary value of the seized items were properly preserved.

In this case, the prosecution offered no plausible explanation. PO2 Nieva merely testified that no barangay official arrived when called. The Court found this insufficient, citing People v. Umipang (686 Phil. 1024 [2012]), which held that mere statements of unavailability, absent actual serious attempts to contact the required witnesses, are unacceptable as justified grounds.

Why This Matters

The Court emphasized that police officers are ordinarily given sufficient time—from receiving information about the accused's activities until the arrest—to prepare for a buy-bust operation and make necessary arrangements to comply with Section 21. The presence of witnesses insulates the apprehension from suspicion of tampering, switching, planting, or contamination of evidence.

The Court also noted that the presumption of regularity in the performance of official duty cannot save the prosecution's case. As stated in the decision, the lapses themselves are affirmative proofs of irregularity.

Practical Takeaways

• The chain of custody rule is strict. Police must account for every link from seizure to court presentation, and the prosecution must prove compliance or justify any deviation.
• Earnest efforts must be shown. Merely stating that witnesses were unavailable is not enough. The prosecution must demonstrate actual serious attempts to secure the required witnesses.
• The saving clause has two requirements. Non-compliance is excused only when there is a justifiable ground AND the integrity of the seized items is preserved—both must be proven as facts.
• Prosecutors have a positive duty. They must acknowledge and justify any deviations from Section 21 during trial, not wait for the defense to raise the issue.
• The presumption of regularity is not a shield. It cannot overcome affirmative evidence of procedural lapses in the chain of custody.

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