Chain of Custody Failures in Drug Cases: Acquittal of Accused in Buy-Bust Operation

The Supreme Court, in People of the Philippines v. Martin H. Asaytuno, Jr. and Renato H. Asaytuno (G.R. No. 245972, December 2, 2019), acquitted two accused individuals convicted of illegal sale and possession of dangerous drugs. The Court reversed the lower courts' rulings because the prosecution failed to establish the identity and integrity of the seized drugs, a requirement essential for conviction in drug-related cases.

The Case: A Buy-Bust Operation Gone Wrong

The case stemmed from a buy-bust operation conducted by police officers in Makati City on February 25, 2015. A police officer, acting as a poseur-buyer, allegedly purchased 0.43 gram of methamphetamine hydrochloride (shabu) from Martin Asaytuno, Jr. and Renato Asaytuno for P1,000. After the arrest, the officers also recovered two additional sachets of suspected shabu from Martin.

The Regional Trial Court convicted both accused of illegal sale of dangerous drugs, and Martin was also convicted of illegal possession. The Court of Appeals affirmed the conviction. On appeal, the Supreme Court reversed the decision and acquitted the accused.

The Issue: Compliance with Chain of Custody Requirements

The central issue was whether the prosecution proved the accused's guilt beyond reasonable doubt, particularly whether the chain of custody requirements under Section 21 of Republic Act No. 9165 (Comprehensive Dangerous Drugs Act of 2002) were properly complied with.

The chain of custody rule requires that the seized drugs presented in court be the exact same items seized from the accused and examined by the crime laboratory. This ensures that the corpus delicti—the body of the offense—is properly established. As the Court emphasized, when there is doubt on the identity and integrity of the seized drugs, acquittal must follow.

The Ruling: Fatal Violations of Section 21

The Supreme Court identified several fatal defects in the prosecution's case:

Failure to immediately mark the seized items. The Court reiterated that marking must be done immediately upon confiscation, in the presence of the accused. In this case, the police officer pocketed the sachet after the alleged sale and only marked the items later at the barangay hall. This created an intervening period during which the drugs remained unaccounted for, casting doubt on their origin and identity.

Absence of required third-party witnesses. Under Republic Act No. 10640, which amended Section 21 in 2014, the presence of two witnesses is required: an elected public official and a representative from the media or the National Prosecution Service. These witnesses must be present not only during the inventory but also at the time of apprehension. Here, no witness was present during the actual buy-bust, and only a barangay official arrived later for the inventory.

Insufficient justification for non-compliance. While non-compliance may be excused under justifiable grounds, the prosecution must prove both the justification and that the integrity of the evidence was preserved. The Court found the police officers' explanations—such as waiting only one minute for an official and leaving due to onlookers—to be perfunctory and unconvincing.

The Court's Message on Presumption of Regularity

The Court also addressed the lower courts' reliance on the presumption of regularity in the performance of official duties. It held that this presumption cannot apply when there is manifest non-compliance with legal requirements. The Court noted that the prosecution's case was "tainted by dubious circumstances," including the accused's allegations that the police officers took P20,000 from them during the arrest.

Practical Takeaways

• Strict compliance is mandatory. Police officers must follow Section 21 of RA 9165 meticulously, including immediate marking of seized items and securing the presence of required witnesses at the time of apprehension.
• Witnesses must be present from the start. The required third-party witnesses cannot simply be called in after the arrest; they must be at or near the place of arrest to witness the seizure and inventory.
• Justifications must be genuine. Courts will not accept sweeping excuses for non-compliance. The prosecution must specifically allege and prove justifiable grounds and show that the evidence's integrity was preserved.
• Presumption of regularity is not automatic. When police officers deviate from legal requirements, the presumption of regularity cannot be invoked to support a conviction.
• Minuscule amounts heighten scrutiny. Cases involving small quantities of drugs require even greater care in establishing the chain of custody, given the heightened risk of planting or tampering.

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