Erosion of Presumption: Unlawful Searches Undermine Drug Possession Convictions

The presumption of regularity in the performance of official duties is a cornerstone of Philippine criminal procedure. It allows courts to assume that law enforcement officers acted properly in the absence of evidence to the contrary. However, this presumption is not absolute. When the prosecution's own evidence reveals significant deviations from established procedures—particularly in the handling of seized drugs—the presumption erodes, and the integrity of the case may be called into question. The Supreme Court's decision in People v. Romorosa (G.R. No. 237209, April 10, 2019) illustrates how the failure to strictly comply with the chain of custody rule under Section 21 of Republic Act No. 9165 can undermine a conviction for illegal drug possession.

The Facts of the Case

On February 20, 2010, agents of the National Bureau of Investigation (NBI) conducted a buy-bust operation in Muntinlupa City that led to the arrest of Catherine Romorosa, along with Mohamad Dampak and Jamil Dampak. The operation was based on information from a confidential informant about a drug deal arranged with a certain "Omar." Romorosa was charged with illegal sale of shabu under Section 5 of RA 9165, while the two male accused faced charges for illegal possession under Section 11.

During the operation, the poseur-buyer purchased two plastic sachets of shabu from Romorosa. The arresting team, however, did not conduct the required marking, inventory, and photographing at the scene. Instead, because a crowd had gathered, the team left immediately and performed these procedures at the NBI office. Notably, no barangay official or Department of Justice representative was present during the inventory, despite the NBI having contacted them.

The Issue: Chain of Custody Compliance

The central issue on appeal was whether the prosecution had established an unbroken chain of custody over the seized drugs, as required by Section 21 of RA 9165 and its implementing rules. The appellant argued that the failure to turn over the drugs to an evidence custodian—and instead having the forensic chemist keep them in his personal steel cabinet—created a gap in the chain that should cast doubt on the identity and integrity of the evidence.

The Ruling: A Strict Standard for Drug Cases

The Supreme Court dismissed the appeal and affirmed the conviction, but its reasoning provides important guidance. The Court reiterated the four essential links in the chain of custody: (1) the seizure and marking of the illegal drug by the apprehending officer; (2) the turnover to the investigating officer; (3) the turnover to the forensic chemist for examination; and (4) the turnover and submission to the court.

The Court held that the forensic chemist's direct submission of the evidence to the court did not violate any mandatory provision of law. Section 21 does not prescribe an intermediary between the forensic chemist and the court, nor does it prohibit the chemist from acting as safekeeper pending transmission. The Court emphasized that what matters is the evidence of how the officer performed his duty as safekeeper—whether the seals were intact, the markings were proper, and there was no opportunity for contamination or substitution.

The Erosion of the Presumption of Regularity

While the Court upheld the conviction in this case, the decision underscores a critical principle: the presumption of regularity is not a shield for procedural lapses. In drug cases, the prosecution bears the heavy burden of proving the corpus delicti beyond reasonable doubt. When law enforcement deviates from the mandatory requirements of Section 21—such as failing to conduct inventory at the scene, or neglecting to secure the presence of required witnesses—the presumption of regularity weakens. The defense can exploit these gaps to challenge the integrity of the evidence.

In Romorosa, the Court found that the prosecution's evidence sufficiently explained the deviations. The crowd at the scene justified the transfer to the NBI office, and the forensic chemist's testimony convincingly established the security measures he took. But the decision serves as a reminder that such explanations must be credible and supported by evidence. Without them, the presumption erodes, and the accused may be entitled to acquittal.

Practical Takeaways

• Strict compliance matters. Law enforcement must adhere to the chain of custody rules under Section 21 of RA 9165. Any deviation must be justified with credible explanations.
• The presumption is rebuttable. The presumption of regularity in official duties can be overcome by evidence of procedural lapses that compromise the integrity of seized items.
• Documentation is key. Proper marking, inventory, and photographing at the scene—or a well-documented justification for doing them elsewhere—are critical to sustaining a conviction.
• For the defense, scrutinize the chain. Gaps in the chain of custody, unexplained deviations, or questionable safekeeping practices can be powerful grounds to challenge the prosecution's case.
• For the accused, the burden is on the prosecution. The prosecution must prove every element of the offense, including the identity and integrity of the drugs, beyond reasonable doubt.

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