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

In a significant ruling on drug cases, the Supreme Court acquitted Nelson Flores y Fonbuena of illegal drug sale charges, emphasizing that police must strictly follow the chain of custody rules under Republic Act No. 9165. The decision in People v. Flores (G.R. No. 220464, June 10, 2019) reinforces that when law enforcement fails to comply with mandatory procedures, reasonable doubt arises, and the accused must be acquitted.

The Facts of the Case

On November 22, 2010, PDEA agents conducted a buy-bust operation against Flores in San Fernando City, La Union. A poseur-buyer allegedly purchased two sachets of shabu worth P1,000.00 using marked money. After the arrest, the police brought Flores to the station, where they conducted the inventory and photographing of the seized drugs.

The prosecution presented the poseur-buyer, a back-up officer, and a forensic chemist as witnesses. The defense, however, claimed that police barged into Flores's house looking for someone else, and that the drugs were merely planted. The trial court convicted Flores, and the Court of Appeals affirmed the conviction.

The Issue

The central question was whether Flores's guilt for violation of Section 5, Article II of RA 9165 was proven beyond reasonable doubt. Specifically, the Court examined whether the police properly complied with the chain of custody requirements under Section 21 of the law.

The Ruling: Acquittal for Procedural Lapses

The Supreme Court reversed the conviction and acquitted Flores. The Court ruled that the prosecution failed to prove the corpus delicti—the very drug itself—due to multiple unexplained breaches of procedure.

The mandatory witnesses were absent. Under Section 21 of RA 9165, the inventory and photographing of seized drugs must be done immediately after seizure in the presence of the accused or counsel, an elected public official, a media representative, and a DOJ representative. In this case, none of these witnesses was present during the arrest, marking, or inventory. The barangay official and media representative only arrived at the police station later to sign a certificate of inventory that was already prepared.

No justifiable explanation was offered. The Court noted that the police offered no sufficient reason for the absence of the DOJ representative, merely stating they could not locate one late in the afternoon. The Court stressed that the prosecution has the positive duty to explain any non-compliance with Section 21, and this explanation must be proven as a fact.

The purpose of the witnesses. The presence of the required witnesses serves to prevent the planting of drugs. When witnesses are called in only after the operation, this purpose is defeated, creating doubt about the integrity of the evidence.

Strict Compliance Matters

The Court clarified that while strict compliance may not always be possible under field conditions, the prosecution must still prove: (1) a justifiable ground for non-compliance, and (2) that the integrity and evidentiary value of the seized items were preserved. Without such proof, the evidence becomes unreliable, and acquittal follows.

The Court also reminded prosecutors to diligently prove compliance with Section 21 and to recognize and explain any deviations. It emphasized that appellate courts may review the records to ensure the required proof has been presented.

Practical Takeaways

• Chain of custody is not a mere technicality. It protects the accused's right to be presumed innocent by ensuring the drug presented in court is the same one seized.
• Witnesses must be present at the time of seizure. Calling them in later to sign documents does not satisfy the law's requirement.
• The prosecution must explain any lapse. Silence or weak excuses for non-compliance with Section 21 can result in acquittal.
• Buy-bust teams should prepare in advance. Since these operations are planned, teams have time to secure the presence of mandatory witnesses.
• For those accused of drug offenses, examine whether the police followed Section 21. Gaps in the chain of custody may be the key to a successful defense.

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