Reasonable Doubt Prevails: Drug Conviction Overturned Due to Flawed Chain of Custody

In drug cases, the seized substance is not just evidence — it is the very heart of the crime. If the prosecution cannot show that the drug presented in court is the exact same item taken from the accused, the case collapses. The Supreme Court made this clear in People of the Philippines v. Niño Calibod y Henobeso (G.R. No. 230230, November 20, 2017), where a man sentenced to life imprisonment for selling shabu walked free because the police skipped key steps in handling the evidence.

What Happened in the Case

Acting on a tip, police set up a buy-bust operation in Barangay Parian, Calamba City, Laguna, on August 18, 2002. A poseur buyer allegedly handed a P100 bill to Calibod in exchange for one plastic sachet of shabu weighing 0.01 gram. Calibod was arrested, the sachet was marked with the officer's initials, and he was taken to the crime laboratory.

The Regional Trial Court convicted Calibod of illegal sale of dangerous drugs under Section 5, Article II of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002. He was sentenced to life imprisonment and fined P500,000. The Court of Appeals affirmed the conviction in full. Calibod elevated the case to the Supreme Court.

The Elements the Prosecution Must Prove

To secure a conviction for illegal sale of dangerous drugs, the prosecution must establish two things: first, the identities of the buyer and seller, the object of the sale, and the consideration; and second, the delivery of the drug and the payment.

Beyond these, the law requires proof of the drug's identity with moral certainty. Because the dangerous drug itself is part of the corpus delicti — the body of the crime — the prosecution must show an unbroken chain of custody from the moment of seizure to its presentation in court.

The Four Links of the Chain of Custody

Citing Dela Riva v. People (769 Phil. 872, 2015), the Court described the chain of custody as having four links:

1. The seizure and marking of the drug by the apprehending officer;
2. The turnover of the drug by the apprehending officer to the investigating officer;
3. The turnover by the investigating officer to the forensic chemist for examination; and
4. The turnover and submission of the marked drug by the forensic chemist to the court.

Section 21, Article II of RA 9165 also requires that immediately after seizure, the police conduct a physical inventory and photograph the items in the presence of the accused (or a representative), a media representative, a Department of Justice representative, and an elected public official. The seized drugs must be turned over to the crime laboratory within 24 hours.

Where the Police Fell Short

The Court found multiple breaches. The marking officer, PO2 Oruga, testified that he marked the sachet and then went straight to the crime laboratory. He never stated that the marking happened in the presence of the required witnesses, nor did he mention whether those witnesses were present at all.

No physical inventory or photograph was shown to have been conducted, whether at the place of arrest or at the nearest police station. The prosecution offered no explanation for these omissions.

There were also gaps in the second and third links. The seized drug was never shown to have been turned over to an investigating officer, and the prosecution was silent on who received the specimen at the crime laboratory and how it was handled before the forensic chemist examined it.

Why the Acquittal Followed

The Court acknowledged that strict compliance with Section 21 is not always possible in the field. Under the law's saving clause, non-compliance does not automatically invalidate the seizure — but only if the prosecution proves a justifiable ground for the lapse and shows that the integrity of the evidence was preserved.

Here, the prosecution did neither. The Court held that the procedure under Section 21 is a matter of substantive law, not a mere technicality that can be brushed aside. With the integrity of the corpus delicti compromised, guilt beyond reasonable doubt could not stand. Calibod was acquitted and ordered released.

The Court closed with a reminder: the fight against illegal drugs, however urgent, cannot outweigh the constitutional protection of every person's liberty — including the guilty.

Practical takeaways

• In illegal drug cases, the prosecution must prove an unbroken chain of custody. A gap in any link can defeat the case.
• The physical inventory and photograph must be done in the presence of the accused, an elected public official, and representatives from the media and the Department of Justice.
• If police deviate from Section 21 of RA 9165, the prosecution must explain why and show that the evidence was still preserved.
• Courts treat Section 21 as substantive law, not a mere procedural formality.
• An accused's denial and frame-up defense may succeed when the prosecution's evidence is compromised.

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