Chain of Custody in Drug Cases: When Police Lapses Do Not Mean Acquittal

In every prosecution for illegal sale of dangerous drugs, the prosecution must prove not only that a sale happened, but that the very substance seized from the accused is the same substance presented in court. This is the essence of the "chain of custody" rule. In People v. Bulotano (G.R. No. 190177, June 11, 2014), the Supreme Court explained when police lapses in the mandatory procedures under Republic Act No. 9165 will—and will not—result in an acquittal.

The Case: A Buy-Bust in Cagayan de Oro

Acting on a tip, PDEA agents conducted a buy-bust operation in Sto. Niño, Cagayan de Oro City. Poseur-buyer PO1 Dizon Dagaraga approached Vivian Bulotano inside a billiard hall and asked to buy ₱200.00 worth of shabu. After Bulotano handed over a plastic sachet of crystalline substance, the officer handed her the marked money and signaled the back-up team. Bulotano was arrested, and laboratory tests later confirmed the sachet contained 0.10 gram of methamphetamine hydrochloride.

Bulotano denied the sale, claiming she was merely playing cards when armed men barged in and arrested her without explanation. The trial court convicted her of violating Section 5, Article II of RA 9165, imposing life imprisonment and a ₱500,000.00 fine. The Court of Appeals affirmed, and Bulotano appealed to the Supreme Court.

The Issue: What Happens When Police Break the Rules?

On appeal, Bulotano pointed to several procedural lapses by the arresting team:

• No photographs were taken of the seized drugs.
• The inventory was signed only by PO1 Dagaraga, with no witnesses from the media, the DOJ, or an elected official.
• The Chemistry Report was notarized by a police officer who was not a commissioned notary public, contrary to the requirement that the certification be under oath.

Section 21 of RA 9165 requires that, immediately after seizure, the apprehending team physically inventory and photograph the drugs in the presence of the accused (or their representative) and witnesses from the media, the DOJ, and an elected public official, all of whom must sign the inventory. The Supreme Court acknowledged that the arresting officers here failed to strictly comply with these requirements.

The Ruling: Integrity of the Evidence Is What Matters

Despite the lapses, the Court upheld Bulotano's conviction. The key principle: noncompliance with Section 21 is not automatically fatal. What matters most is whether the integrity and evidentiary value of the seized drugs were preserved.

The Court cited the saving clause in the Implementing Rules and Regulations of RA 9165, which states that noncompliance under justifiable grounds will not render the seizure void, as long as the integrity of the seized items is preserved. The "chain of custody" rule exists to remove doubts about the identity of the evidence—from the moment of seizure, through laboratory examination, to its presentation in court.

In this case, the chain was unbroken. PO1 Dagaraga personally marked the sachet with his initials "DGD," prepared the inventory and the request for laboratory examination, and personally delivered the specimen to the PNP Crime Laboratory. SPO1 Samuel Tabligan received it and identified the same marked sachet in court. The forensic chemist examined it and confirmed it was shabu. The prosecution's witnesses positively identified the same item throughout.

The Court also rejected Bulotano's bare denial, noting that police officers are presumed to have performed their duties regularly, and she failed to show any ill motive on their part.

A Warning to Law Enforcement

The Court, however, did not treat the police lapses lightly. It stressed that Section 21 is not a mere job description—it is a safeguard ensuring that the thing presented in court is exactly what was confiscated. When the procedure is disregarded without justifiable reason, an acquittal results. The Court noted that gross disregard of these safeguards generates serious uncertainty about the identity of the seized items. It also reminded arresting officers that RA 9165 criminalizes misappropriation, planting of evidence, and failure to account for seized drugs.

Practical Takeaways

• Strict compliance matters, but it is not everything. The ultimate test in drug cases is whether the integrity of the seized drugs was preserved, not mere technical compliance with Section 21.
• The chain of custody must be shown. Prosecutors must present witnesses who can trace the drug from seizure, to marking, to laboratory, to court. A single unexplained link can be fatal.
• Marking is the starting point. The arresting officer's immediate marking of the seized item is the first link in the custodial chain.
• Lapses without justification can lead to acquittal. Police cannot simply ignore Section 21 and expect conviction to stand. Gross disregard of the rules creates reasonable doubt.
• Denials rarely prevail. A bare denial, without evidence of police ill motive, will not overcome the positive identification of prosecution witnesses.

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