Chain of Custody in Drug Cases: Marking at Nearest Office Is Sufficient for Conviction

In drug cases, the prosecution must prove not only that the accused sold or possessed illegal drugs, but also that the drugs presented in court are the very same items seized from the accused. This is the essence of the chain of custody rule. A common defense raised by accused persons is that the police failed to mark, photograph, and inventory the seized drugs immediately at the place of arrest. In People v. Quilang (G.R. No. 232619, August 29, 2018), the Supreme Court clarified that marking at the nearest police station or office of the apprehending team is sufficient compliance with the rule.

The Facts of the Case

On March 28, 2011, operatives of the Philippine Drug Enforcement Agency (PDEA) Region 2 Office conducted a buy-bust operation against Jomar Quilang y Bangayan. During the operation, a plastic sachet containing 0.06 gram of suspected shabu was recovered from him. The team, together with Quilang, then proceeded to the PDEA Region 2 Office, where the seized item was marked, photographed, and inventoried in the presence of a barangay captain, a Department of Justice representative, and a media representative. The sachet was later brought to the crime laboratory, which confirmed that it contained methamphetamine hydrochloride, or shabu.

Quilang denied the charge, claiming that armed men identifying themselves as PDEA agents accosted him, took money and a cellphone from his pocket, and dragged him into a van. He said he only saw the sachet at the police station. The Regional Trial Court found him guilty of illegal sale of dangerous drugs and sentenced him to life imprisonment and a fine of P500,000.00. The Court of Appeals affirmed the conviction, holding that marking the seized item at the nearest office of the apprehending team constitutes sufficient compliance with the chain of custody rule.

The Issue

The sole issue on appeal was whether the PDEA agents' failure to mark the seized item immediately at the place of arrest—instead doing so at their office—violated the chain of custody rule and thus cast doubt on the integrity of the seized drug.

The Ruling: Marking at the Nearest Office Is Allowed

The Supreme Court dismissed the appeal and affirmed Quilang's conviction. The Court held that for a conviction for illegal sale of dangerous drugs under Section 5, Article II of Republic Act No. 9165 (the Comprehensive Dangerous Drugs Act of 2002), the prosecution must prove: (a) the identity of the buyer and seller, the object, and the consideration; and (b) the delivery of the thing sold and the payment. Here, all elements were present, as Quilang was caught in flagrante delicto selling shabu to a poseur-buyer during a legitimate buy-bust operation.

On the chain of custody issue, the Court clarified that while the law generally requires marking, physical inventory, and photography to be conducted immediately after seizure, Section 21(a) of the Implementing Rules and Regulations of RA 9165—later adopted into the text of RA 10640—allows these procedures to be conducted at any of the following places, whichever is practicable: (1) the place where the arrest or seizure occurred, (2) the nearest police station, or (3) the nearest office of the apprehending officer or team, in instances of warrantless seizures such as buy-bust operations.

The Court cited case law recognizing that "marking upon immediate confiscation contemplates even marking at the nearest police station or office of the apprehending team." Therefore, the failure to mark the confiscated items at the place of arrest neither renders them inadmissible in evidence nor impairs the integrity of the seized drugs.

Why the Conviction Stood

Applying these principles, the Court found that the buy-bust team conducted the marking, physical inventory, and photography of the seized item at the PDEA Region 2 Office—which is the nearest office of the apprehending team—and did so in the presence of an elected public official, a DOJ representative, and a media representative. Moreover, the poseur-buyer positively identified during trial the item seized from Quilang. The Court held that there was sufficient compliance with the chain of custody rule, and the integrity and evidentiary value of the corpus delicti were preserved.

Practical Takeaways

• Marking need not be at the exact place of arrest. In warrantless seizures like buy-bust operations, marking, inventory, and photography may be done at the nearest police station or the nearest office of the apprehending team, whichever is practicable.
• Compliance with witnesses matters. The presence of an elected public official, a DOJ representative, and a media representative during the inventory strengthens the prosecution's case and helps preserve the integrity of the evidence.
• The chain of custody is about integrity, not technical perfection. Minor deviations from the prescribed procedure will not automatically result in acquittal if the integrity and evidentiary value of the seized drugs are preserved and the prosecution can account for each link in the chain.
• Positive identification is key. The poseur-buyer's identification of the seized item during trial is a significant factor in establishing the identity of the corpus delicti.
• For the defense, focus on actual gaps. Challenging the chain of custody is more effective when there is a genuine break in the chain—such as unaccounted handling or tampering—rather than merely pointing out that marking was done at a police station or office instead of the arrest site.

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