Chain of Custody in Drug Cases: Witness Requirements and Evidentiary Integrity

The Supreme Court has once again underscored that in drug cases, the prosecution must strictly account for every link in the chain of custody of seized drugs—or risk an acquittal. In People v. Sanchez (G.R. No. 239000, November 5, 2018), the Court reversed a conviction for illegal sale of dangerous drugs because the arresting team failed to justify the absence of required witnesses during the inventory and photography of the seized items. The ruling serves as a firm reminder to law enforcers and prosecutors that procedural lapses in the chain of custody can compromise the integrity of the evidence and the entire case.

The Facts of the Case

On the evening of August 9, 2013, operatives of the Philippine Drug Enforcement Agency (PDEA) conducted a buy-bust operation against Jerome Emar Sanchez y Edera. Two sachets containing white crystalline substance were allegedly obtained from him. Because a crowd had formed at the place of arrest, the team, together with Sanchez, proceeded to their headquarters, where the seized items were marked, photographed, and inventoried in the presence of a Barangay Kagawad. Laboratory examination later confirmed the substance was 0.3512 gram of methamphetamine hydrochloride or shabu.

Sanchez denied the charges, claiming he was forcibly taken by six men who brought him to the PDEA office. The Regional Trial Court convicted him of illegal sale of dangerous drugs, and the Court of Appeals affirmed. On appeal, the Supreme Court reversed the conviction.

The Issue

The central question was whether the prosecution had adequately established the chain of custody of the seized drugs, particularly whether the absence of required witnesses during the inventory and photography was justified.

The Chain of Custody Rule

Under Section 21, Article II of Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002), the marking, physical inventory, and photography of seized drugs must be conducted immediately after seizure. Before the amendment by RA 10640, the inventory and photography had to be done in the presence of the accused or his representative or counsel, and in the presence of (a) a representative from the media, (b) a representative from the Department of Justice (DOJ), and (c) any elected public official.

The presence of these witnesses is not a mere technicality. The Court has repeatedly held that the requirement is a matter of substantive law, designed to remove any suspicion of switching, planting, or contamination of evidence.

When Strict Compliance May Be Relaxed

The Court recognizes that field conditions may not always allow strict compliance. Under the saving clause in the Implementing Rules and Regulations of RA 9165, non-compliance will not automatically invalidate the seizure if the prosecution proves two things: (a) there was a justifiable ground for the non-compliance, and (b) the integrity and evidentiary value of the seized items were properly preserved.

Crucially, the prosecution must explain the reasons behind the procedural lapses, and these reasons must be proven as facts—the Court cannot presume them. Mere statements of unavailability, without showing actual serious attempts to secure the presence of the required witnesses, are unacceptable.

The Court's Ruling

In this case, the Court found that the marking of the items at the PDEA office was justified because of the crowd at the arrest scene. However, the inventory and photography were conducted without representatives from the DOJ and the media.

The PDEA agents testified that their team leader had called for these representatives but nobody came. The Court found this insufficient. The prosecution should have called the team leader to the witness stand to show that earnest efforts were made to secure the presence of the required witnesses. Without such proof, the Court held there was an unjustified deviation from the chain of custody rule, compromising the integrity and evidentiary value of the seized items. Sanchez was acquitted.

Practical Takeaways

• The chain of custody is substantive law, not a technicality. Police officers and prosecutors must treat the requirements of Section 21 of RA 9165 with utmost seriousness.
• Justifiable grounds must be proven, not presumed. A bare assertion that witnesses were unavailable is not enough. The prosecution must present evidence of genuine and sufficient efforts to secure their presence.
• The team leader should testify. If the arresting team claims it tried to secure witnesses, the team leader or the officer who made the attempts should be presented in court to substantiate the claim.
• Preparation begins before the operation. Police officers typically have time between receiving information and executing a buy-bust to arrange for the presence of required witnesses.
• For the defense, scrutinize the chain. The absence of required witnesses, unexplained by the prosecution, can be a ground for acquittal even if raised for the first time on appeal.

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