Acquittal in Drug Case: Why Broken Chain of Custody Fatal to Prosecution

The Supreme Court, in People of the Philippines v. Paterno Lorenzo y Casas (G.R. No. 184760, April 23, 2010), reversed a drug conviction because the prosecution failed to prove the identity of the seized drugs with moral certainty. The case underscores a vital rule in drug prosecutions: the police must follow the strict procedures for handling confiscated drugs, and any lapse that compromises the evidence's integrity can lead to acquittal.

The Buy-Bust Operation and the Arrest

On the night of September 9, 2003, police officers in San Mateo, Rizal, acting on information from a confidential informant, set up a buy-bust operation against a suspected drug peddler. At around 1:00 a.m. the next day, the informant reported that the suspect was selling drugs. The team proceeded to the area, and the informant approached the suspect, handing over marked money in exchange for a sachet of suspected shabu (methamphetamine hydrochloride).

Police officers then arrested the suspect, Paterno Lorenzo, and recovered the marked money and two more sachets of shabu from him. A companion, Conrado Estanislao, was also arrested after a sachet was found in his pocket. The seized items were later submitted to the PNP Crime Laboratory, which confirmed they were positive for methamphetamine hydrochloride.

The Trial and Conviction

Lorenzo was charged with illegal sale and illegal possession of dangerous drugs under Sections 5 and 11, Article II of Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002). The Regional Trial Court convicted him, relying on the presumption of regularity in the performance of official duties by the police. The Court of Appeals affirmed the conviction.

The Issue: Was the Chain of Custody Broken?

Lorenzo appealed, arguing that the police failed to follow the mandatory procedure under Section 21 of RA 9165 for the custody and disposition of seized drugs. Specifically, the police did not conduct a physical inventory of the seized items or photograph them in the presence of the required witnesses.

The Supreme Court agreed. The Court ruled that the prosecution's case failed because it did not establish the identity of the prohibited drug with moral certainty. The Court emphasized that for both illegal sale and illegal possession, the prosecution must prove not only the elements of the offense but also that the substance seized from the accused is the same substance examined by the forensic chemist and presented in court.

The Importance of the Chain of Custody Rule

Section 21, Article II of RA 9165 and its Implementing Rules and Regulations require the apprehending team to physically inventory and photograph the seized drugs immediately after seizure, in the presence of the accused (or his representative or counsel), a representative from the media, a representative from the Department of Justice, and any elected public official.

While the law allows some flexibility—non-compliance will not invalidate a seizure if the integrity and evidentiary value of the items are preserved—the Court clarified that this saving clause applies only where the prosecution recognizes the lapses and explains the justifiable grounds.

In this case, the prosecution acknowledged the failure to coordinate with the Philippine Drug Enforcement Agency but failed to explain the absence of an inventory and photographs. The lone prosecution witness, a police officer, could not even state with certainty when and where the seized items were marked, or who had custody of them afterward.

The Court's Ruling

The Supreme Court reversed the conviction and acquitted Lorenzo. The Court held that the failure to establish the chain of custody created reasonable doubt as to whether the sachets submitted for laboratory examination were the same ones allegedly seized from the accused. The presumption of innocence, therefore, prevailed.

Practical Takeaways

• Chain of custody is critical. In drug cases, the prosecution must prove that the drugs seized from the accused are the same drugs examined and presented in court. Any gap in the chain can be fatal.
• Police must follow Section 21 of RA 9165. Immediate physical inventory and photographing of seized drugs in the presence of required witnesses are mandatory. Non-compliance must be justified with credible grounds.
• The presumption of regularity is not automatic. Courts will not presume that police followed procedure when the prosecution fails to present evidence of compliance.
• The poseur-buyer matters. In buy-bust operations, the testimonies of the police officers who witnessed the transaction are crucial. Failure to present the poseur-buyer can weaken the prosecution's case.
• For the accused, raise procedural lapses. Defense counsel should always examine whether the police complied with the chain of custody rules, as any lapse may create the reasonable doubt needed for acquittal.

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