Chain of Custody in Drug Cases: Why Procedural Lapses Lead to Acquittal

The Supreme Court has once again reminded law enforcers 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 the very same items seized from the accused. In People v. Seguiente y Ramirez (G.R. No. 218253, June 20, 2018), the Court acquitted the accused because the police failed to follow the mandatory chain of custody rules under Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002. The ruling is a significant reminder that procedural compliance is not mere formality—it protects the integrity of the evidence and the rights of the accused.

The Facts of the Case

On April 17, 2006, police officers in Zamboanga City conducted a buy-bust operation against a certain "Lyn," later identified as Evelyn Seguiente, who was allegedly selling shabu. A poseur-buyer purchased Php100 worth of shabu from her, and after the pre-arranged signal, the back-up officers arrested her. A second sachet of shabu was found during a search of her person.

The seized items were marked at the police station, inventoried, and later submitted to the crime laboratory. The test results confirmed that both sachets contained methamphetamine hydrochloride, or shabu. The accused was charged with illegal sale and illegal possession of dangerous drugs. The trial court convicted her, and the Court of Appeals affirmed. On appeal, the Supreme Court reversed the conviction.

The Issue: Was the Chain of Custody Broken?

The central question was whether the prosecution had sufficiently established the chain of custody of the seized drugs. The accused argued that the police failed to conduct the physical inventory and photograph the seized items in her presence and in the presence of the witnesses required by law. The prosecution admitted that the inventory certificate bore only the signature of one police officer, and no photographs were taken at all.

The Ruling: Strict Compliance Is Required

The Supreme Court ruled in favor of the accused. The Court explained that Section 21 of RA 9165 requires the apprehending team to conduct a physical inventory and take photographs of the seized items in the presence of:

• the accused or the person from whom the items were seized, or the accused's representative or counsel;
• an elected public official; and
• a representative from the media or the National Prosecution Service.

These witnesses must sign the inventory and receive copies of it. The Court noted several procedural lapses in the case:

1. Marking not done in the accused's presence. While the police testified that the items were marked at the station, there was no showing that the marking was done in the presence of the accused. Citing People v. Salonga, the Court reiterated that marking must always be done in the presence of the accused or their representative.

2. Incomplete inventory. The Certificate of Inventory on record bore only the signature of one police officer. There was no evidence that the inventory was conducted in the presence of the accused or the required witnesses.

3. No photographs taken. The prosecution admitted that no photographs of the seized items were taken. The Court noted that photographs are intended to confirm the chain of custody of dangerous drugs.

The Saving Clause Cannot Be Invoked Without Justification

The Court acknowledged that the Implementing Rules and Regulations of RA 9165, as amended by RA 10640, contain a saving clause. This clause provides that non-compliance with the procedure will not automatically invalidate the seizure if the prosecution can show justifiable grounds for the lapse and prove that the integrity and evidentiary value of the seized items were preserved.

However, the Court emphasized that the saving clause only applies when the prosecution recognizes the procedural lapses, provides justifiable grounds for them, and establishes that the evidence remains intact. In this case, the prosecution offered no explanation for its failures. It did not conduct re-direct examination or present rebuttal evidence to justify the lapses, even after the defense raised these issues during trial.

Why This Matters

The Court stressed that these lapses created serious doubts about the identity and integrity of the corpus delicti—the body of the crime, which in drug cases is the illegal substance itself. Citing People v. Relato, the Court held that when substantial gaps in the chain of custody raise grave doubts about the authenticity of the drugs presented in court, the prosecution fails to prove guilt beyond reasonable doubt. The accused was acquitted and ordered released from detention.

Practical Takeaways

• Chain of custody is critical. In every drug case, the prosecution must account for the seized drugs from the moment of seizure to their presentation in court. Any gap can be fatal to the case.
• Marking must be done in the accused's presence. Marking should be done immediately upon confiscation, or at the nearest police station, but always in the presence of the accused or their representative.
• Inventory and photographs are mandatory. The physical inventory must be signed by the accused (or their representative), an elected public official, and a representative from the media or the National Prosecution Service. Photographs of the seized items must also be taken.
• The saving clause is not automatic. Non-compliance can be excused, but only if the prosecution explains the justifiable grounds and proves that the integrity of the evidence was preserved.
• For law enforcement: Strict adherence to Section 21 of RA 9165 is not optional. Failure to comply can result in the acquittal of a guilty person.

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