Upholding Chain of Custody in Drug Cases: Ensuring the Integrity of Evidence

In drug prosecutions, the outcome often turns on a single question: is the substance presented in court truly the same substance seized from the accused? Philippine law imposes strict safeguards to answer that question, and the Supreme Court's decision in People v. Sevilla illustrates how those safeguards operate in practice.

The Case Against Eric Sevilla

Acting on a tip from a confidential informant, police organized a buy-bust operation in Panabo City, Davao. A poseur-buyer approached Eric Sevilla and purchased two packets of dried marijuana leaves for one hundred pesos. After the exchange, backup officers arrested Sevilla and recovered from him the marked money and ten additional packets of marijuana weighing roughly 55.8873 grams.

Sevilla was charged with illegal sale of dangerous drugs under Section 5, Article II of Republic Act No. 9165, and illegal possession under Section 11 of the same law. The Regional Trial Court convicted him on both counts, and the Court of Appeals affirmed. Sevilla elevated the case to the Supreme Court.

The Chain of Custody Requirement

Section 21, Article II of RA 9165 requires that immediately after seizure, the apprehending team physically inventory and photograph the seized drugs in the presence of the accused or his representative, a representative from the media, a representative from the Department of Justice, and an elected public official. These witnesses must sign copies of the inventory.

The law's Implementing Rules and Regulations recognize that strict compliance may not always be possible. Non-compliance under justifiable grounds does not automatically invalidate the seizure, provided the integrity and evidentiary value of the seized items are properly preserved.

Why the Court Upheld the Conviction

Sevilla argued that the police failed to photograph the drugs at the moment of seizure, that required witnesses were absent at the arrest, and that the drugs were sealed only at the police station rather than at the crime scene. He contended these lapses broke the chain of custody.

The Supreme Court disagreed. The records showed that the poseur-buyer marked the two purchased packets at the scene and in Sevilla's presence, while another officer marked the ten packets recovered from him. The team then proceeded to the police station, where they conducted the inventory and took photographs in the presence of Sevilla, his representative, a media representative, an elected official, and a DOJ representative.

The seized items were delivered to the crime laboratory, received and weighed by a police officer, turned over to the evidence custodian, and examined by the forensic chemist. Each packet bore markings, signatures, and case control numbers. The same marked packets were identified in court during trial.

The Court held that the prosecution established a clear and unbroken chain of custody. The integrity and evidentiary value of the marijuana were preserved, and the presumption of regularity in the performance of official duties stood.

Penalties Imposed

For illegal sale of dangerous drugs, the penalty is life imprisonment to death and a fine ranging from five hundred thousand to ten million pesos, regardless of quantity. Because Republic Act No. 9346 abolished the death penalty, life imprisonment was imposed.

For illegal possession of less than three hundred grams of marijuana, the penalty is imprisonment of twelve years and one day to twenty years, plus a fine. Sevilla received twelve years and one day as minimum to thirteen years as maximum, with a fine of three hundred thousand pesos.

Practical Takeaways

• Marking at the scene matters. The Court gave weight to the fact that officers marked the seized drugs at the place of arrest in the accused's presence, even though sealing occurred later at the station.
• Inventory and photographs need witnesses. Compliance with the witness requirement—accused or representative, media, DOJ, and elected official—strengthens the prosecution's case considerably.
• An unbroken chain defeats challenges. When each custodian properly documents the transfer of seized items, courts will uphold the integrity of the evidence.
• Substantial compliance may suffice. Minor procedural lapses do not automatically void a seizure if the integrity of the evidence is preserved.
• The presumption of regularity applies. Absent proof of ill motive, courts presume that police officers performed their duties properly.

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