Broken Chains: Why Lapses in Drug Evidence Custody Lead to Acquittal

The Supreme Court has once again underscored that in drug cases, the procedure for handling seized evidence is not a mere technicality but a matter of substantive law. In People v. Bangalan (G.R. No. 232249, September 3, 2018), the Court acquitted an accused because the prosecution failed to justify lapses in the chain of custody of the seized marijuana. The ruling serves as a firm reminder to law enforcers and prosecutors: sloppy evidence handling can cost the State a conviction.

The Facts of the Case

On July 27, 2012, police operatives in Tuguegarao City conducted a buy-bust operation against Wilt Sam Bangalan y Mamba, who was arrested after allegedly selling 8.12 grams of dried marijuana leaves. The seized item was brought to the police station, where it was marked, photographed, and inventoried in the presence of a barangay kagawad. It was then submitted to the crime laboratory, which confirmed it was marijuana.

Bangalan denied the charge, claiming he was forcibly taken by two men and detained after he refused to disclose the whereabouts of a certain individual. The Regional Trial Court convicted him of illegal sale of dangerous drugs under Section 5, Article II of Republic Act No. 9165, and the Court of Appeals affirmed with a modified fine. On appeal, the Supreme Court reversed the conviction.

The Issue: Integrity of the Corpus Delicti

The central question was whether the prosecution had established with moral certainty the identity and integrity of the seized drugs. In drug cases, the dangerous drug itself is the corpus delicti of the crime. If the prosecution fails to prove the integrity of the evidence, the case against the accused collapses.

To establish this, the prosecution must account for each link in the chain of custody — from the moment of seizure to presentation in court. Under Section 21, Article II of RA 9165, the marking, physical inventory, and photography of seized items must be conducted immediately after seizure in the presence of the accused or his representative, and certain required witnesses.

The Required Witnesses Rule

At the time of the arrest in 2012, the law required the presence of three witnesses during the inventory and photography: a representative from the media, a representative from the Department of Justice (DOJ), and any elected public official. (This was later amended by RA 10640 in 2014 to require only an elected public official and a representative of the National Prosecution Service or the media.)

The presence of these witnesses is designed to remove any suspicion of switching, planting, or contamination of evidence. The Supreme Court has repeatedly emphasized that compliance with this rule is strictly enjoined, as the law was crafted to address potential police abuses, especially where the penalty can be life imprisonment.

The Saving Clause and Its Limits

The Court has recognized that strict compliance may not always be possible due to field conditions. Under the saving clause in the Implementing Rules and Regulations of RA 9165 (later adopted into RA 10640), non-compliance will not automatically invalidate the seizure if the prosecution proves two things: (1) there was a justifiable ground for non-compliance, and (2) the integrity and evidentiary value of the seized items were properly preserved.

Crucially, the prosecution must explain the reasons behind the procedural lapses. The Court cannot presume what these grounds are or that they even exist. Mere statements of unavailability, without actual serious attempts to contact the required witnesses, are unacceptable. Police officers are given sufficient time to prepare for a buy-bust operation and should make the necessary arrangements beforehand.

The Fatal Lapses in This Case

In Bangalan, the prosecution failed on both counts. The police officer who participated in the inventory could not remember whether a DOJ representative or media representative was invited. This failure to remember, without more, was considered too flimsy an excuse to trigger the saving clause.

Worse, the records showed no indication that photographs of the confiscated items were taken at all. This lapse was completely unacknowledged and left unjustified by the prosecution. Because of these deviations, the Court concluded that the integrity and evidentiary value of the seized items were compromised, warranting acquittal.

Practical Takeaways

• Compliance is substantive, not technical. The chain of custody rule under Section 21 of RA 9165 is a matter of substantive law. Police officers must strictly follow the procedure for marking, inventory, and photography of seized drugs.
• Witnesses must be secured. The presence of the required witnesses — media, DOJ, and elected public official (or the amended set under RA 10640) — is mandatory. Police must exert genuine and sufficient efforts to secure their presence, not merely claim they were unavailable.
• Document everything. The prosecution must account for each link in the chain. Failure to photograph the seized items, without explanation, can be fatal to the case.
• The saving clause has limits. Non-compliance can be excused only if the prosecution proves a justifiable ground and that the integrity of the evidence was preserved. The Court will not presume these grounds exist.
• For the accused, procedural lapses matter. A conviction can be overturned on appeal — even on grounds raised for the first time — if the evidence's integrity is compromised.

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