Ensuring Drug Integrity: Upholding Chain of Custody in Illegal Possession Cases

The integrity of seized drugs is the heart of any prosecution under the Comprehensive Dangerous Drugs Act of 2002. If the police cannot account for every link in the chain of custody, the evidence becomes doubtful, and the accused may walk free. In People v. Maylon y Alvero (G.R. No. 240664, March 11, 2019), the Supreme Court clarified a practical point: marking and inventory need not always happen at the exact place of arrest, especially when the situation turns hostile.

The Buy-Bust and the Arrest

In August 2014, operatives of the Marikina City Station Anti-Illegal Drugs Special Operation Task Group conducted a buy-bust operation against Jonathan Maylon and Arnel Estrada. Maylon allegedly sold a sachet of shabu to a poseur-buyer, and both men were found with additional plastic sachets containing white crystalline substance later confirmed as methamphetamine hydrochloride.

The police marked the seized items at the place of arrest. However, because relatives of the accused began causing a commotion and appeared ready to attack the officers, the team moved to the nearest police station to conduct the inventory and photography. The inventory was done in the presence of two elected public officials and a media representative.

Both the Regional Trial Court and the Court of Appeals convicted the accused. On appeal, the defense argued that the chain of custody was broken because the inventory was not done at the scene.

The Elements of the Crimes

For illegal sale of dangerous drugs under Section 5, Article II of RA 9165, the prosecution must prove the identity of the buyer and seller, the object and consideration, and the delivery of the drug and payment. For illegal possession under Section 11, the prosecution must show that the accused possessed a prohibited drug, that the possession was unauthorized, and that the accused freely and consciously possessed it.

The Court found all these elements present. Maylon was caught selling shabu to the poseur-buyer, and both accused were found in possession of sachets containing shabu. The Court deferred to the trial court's assessment of witness credibility, noting that the trial court is in the best position to judge the demeanor of witnesses.

The Chain of Custody Rule

The dangerous drug itself is the corpus delicti of the crime. Its identity must be established with moral certainty, and the prosecution must account for each link of the chain of custody from seizure to presentation in court.

Section 21, Article II of RA 9165 requires marking, physical inventory, and photography of seized items immediately after seizure. The law also requires the presence of certain witnesses during inventory: before the amendment by RA 10640, a representative from the media and the Department of Justice, and any elected public official; after the amendment, an elected public official and a representative of the National Prosecution Service or the media.

The Court made an important clarification: marking upon immediate confiscation contemplates even marking at the nearest police station or office of the apprehending team. Therefore, failure to mark at the exact place of arrest does not automatically render the drugs inadmissible or impair their integrity.

Why the Police Station Inventory Was Valid

In this case, the police had good reason to relocate. PO3 Olveda testified that relatives of the accused were acting aggressively, and the team decided to continue the inventory at the nearest precinct to avoid a commotion. The Court found this justified.

More importantly, the buy-bust team had secured the presence of an elected public official and a media representative even before the operation began. The media representative and Councilor Acuña accompanied the team and waited for the operation to finish. This confirmed compliance with the witness requirement under RA 10640.

The seized items were then personally delivered to the crime laboratory, where tests confirmed the presence of shabu. The chain of custody was unbroken, and the integrity of the evidence was preserved.

Practical Takeaways

• Marking can happen at the nearest police station. The law's "immediately after seizure" requirement is satisfied when marking is done at the nearest police station or office of the apprehending team, especially when the arrest scene becomes unsafe.
• Document the reason for relocating. Police should be ready to explain why inventory was not done at the place of arrest. A credible justification, such as a hostile crowd, strengthens the prosecution's case.
• Secure witnesses before the operation. Having an elected public official and a media representative present from the start of the operation demonstrates good practice and satisfies the witness requirement under RA 10640.
• The drug is the crime. Without proof of the drug's identity and integrity, the prosecution fails. Every link in the chain of custody matters, from seizure to laboratory examination to court presentation.
• Trial court findings are given weight. Courts generally defer to the trial court's credibility findings unless there is a clear oversight or misapplication of facts.

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