Chain of Custody Safeguarding Rights in Drug Cases

The Supreme Court has long held that 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 exactly the same items seized from the accused. In People v. Reniedo (G.R. No. 206927, July 13, 2016), the Court acquitted an accused because the police failed to observe the chain of custody rule and the mandatory requirements of Section 21 of Republic Act No. 9165. The ruling is a reminder that procedural lapses by law enforcement can mean the difference between conviction and acquittal.

The Buy-Bust Operation

On April 27, 2004, police officers in San Juan conducted a buy-bust operation against Darius Reniedo y Cauilan. PO1 Antazo acted as the poseur buyer and allegedly purchased one plastic sachet of shabu from the accused for P100.00. After the sale, the team arrested Reniedo and recovered two more sachets from a Clorets candy case in his pocket. The seized items were marked, brought to the police station, and later submitted to the crime laboratory, which confirmed they contained methamphetamine hydrochloride.

Reniedo was charged with illegal sale and illegal possession of dangerous drugs. He denied the charges, claiming he was merely playing cards when the police arrested him and later tried to extort money from him.

The Issue: Was the Chain of Custody Broken?

The trial court convicted Reniedo, relying on the lone testimony of PO1 Antazo and the presumption of regularity in the performance of police duties. The Court of Appeals affirmed the conviction. But the Supreme Court reversed, acquitting Reniedo on the ground of reasonable doubt.

The Court ruled that the prosecution failed to establish an unbroken chain of custody over the seized drugs. The records showed only that PO1 Antazo marked the drugs and turned them over to investigator PO1 Tuyay, who requested laboratory examination. The prosecution did not show:

• Who had custody of the drugs while in transit from the crime scene to the police station
• Who actually delivered the drugs to the crime laboratory and who received them there
• Who possessed the drugs after laboratory examination and before presentation in court

PO1 Antazo himself could not even remember who accompanied him to the laboratory. These gaps put into question whether the drugs examined and presented in court were the same items seized from the accused.

Section 21, RA 9165: Mandatory Safeguards

The Court also noted that the police failed to comply with Section 21 of RA 9165. This provision requires that upon seizure of illegal drugs, the apprehending team must:

1. Conduct a physical inventory of the seized items
2. Take photographs of the same
3. Do so in the presence of the accused or his counsel, a representative from the media and the Department of Justice, and any elected public official
4. Require all these persons to sign the inventory and receive copies

In this case, no inventory was conducted and no photographs were taken. The prosecution offered no justification for this non-compliance. The Court emphasized that Section 21 is a substantive law that mandates strict compliance, serving as a safety precaution against potential abuses by law enforcement agents.

Why the Lapses Matter

The Court explained that the identity of the illegal drug is the corpus delicti — the very body of the crime — in drug cases. Unlike other evidence, drugs are indistinct, not readily identifiable, and easily open to tampering, alteration, or substitution. When the courts have reason to doubt the identity of the drug presented, the actual crime charged is put into serious question.

The unexplained procedural lapses also negated the presumption of regularity in the performance of police duties. The Court cited its ruling in People v. Gonzales (708 Phil. 121 [2013]), where it acquitted an accused for the same failure to conduct inventory and photographing.

Practical Takeaways

• Chain of custody is not optional. The prosecution must account for the seized drugs at every stage — from seizure, to marking, to turnover, to laboratory examination, and finally to presentation in court. Any unexplained gap can result in acquittal.
• Section 21 compliance is mandatory. Police must conduct a physical inventory and take photographs of seized drugs in the presence of the accused or his counsel, a media representative, a DOJ representative, and an elected public official. Non-compliance must be justified by justifiable grounds, and the integrity of the evidence must still be preserved.
• The presumption of regularity is not absolute. It cannot save a case where the police failed to follow the mandatory procedures under the law. Unexplained non-compliance taints the performance of duties and negates the presumption.
• For accused persons and their counsel. Scrutinize the prosecution's evidence on the chain of custody. Gaps in the handling of the seized drugs can be a powerful defense, even when the accused cannot present a strong counter-narrative.
• For law enforcement. Strict adherence to Section 21 and proper documentation of the chain of custody are essential to ensure that guilty persons are not acquitted on technical but substantive grounds.

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