Gaps in Chain of Custody Acquit Accused in Shabu Possession Case

In drug prosecutions under Republic Act No. 9165, the dangerous drug itself is the very corpus delicti of the offense. The prosecution must prove not only that the accused possessed it, but also that the substance presented in court is the same substance seized from the accused. In People v. Alcuizar (G.R. No. 189980, April 6, 2011), the Supreme Court reminded trial courts that lapses in the chain of custody — however routine they may seem — can create reasonable doubt that warrants acquittal.

The Case Before the Court

Alberto Bacus Alcuizar was charged with illegal sale of shabu, maintaining a drug den, illegal possession of shabu, and illegal possession of drug paraphernalia under Sections 5, 6, 11, and 12 of Republic Act No. 9165. The cases were tried separately. For the charge of illegal possession of shabu under Section 11, the Regional Trial Court of Cebu City convicted Alcuizar and sentenced him to life imprisonment and a fine of P400,000.00. The Court of Appeals affirmed.

The prosecution's lone witness, SPO1 Meliton Agadier, testified that police officers secured a search warrant and implemented it on June 15, 2003. Recovered inside Alcuizar's house were heat-sealed plastic packets of white crystalline substance later confirmed to be methamphetamine hydrochloride, or shabu. The trial court relied on the presumption that when prohibited drugs are found in a house belonging to and occupied by a person, that person is in possession of the drugs. The defense of denial and claims of planting of evidence were rejected.

The Issue

The core issue was whether the prosecution proved Alcuizar's guilt beyond reasonable doubt, particularly whether the identity and integrity of the seized drugs were preserved. Alcuizar argued that the chain of custody was unreliable, and that police officers failed to mark the evidence immediately after confiscation and failed to give him a copy of the inventory receipt.

The Chain of Custody Rule

The Supreme Court reiterated that the dangerous drug itself constitutes the corpus delicti of the offense. Because shabu is indistinct, not readily identifiable, and easily open to tampering, alteration, or substitution, the prosecution must show that the drug offered in court is the same drug actually recovered from the accused.

The chain of custody rule requires testimony about every link in the chain — from the moment the item was picked up to the time it is offered in evidence. Every person who touched the exhibit must describe how and from whom it was received, what happened to it while in that person's possession, and the precautions taken to ensure no change in its condition.

Marking of seized items should be done in the presence of the apprehended violator and immediately upon confiscation. While marking at the nearest police station is allowed, the Supreme Court noted that this rule contemplates warrantless searches. Here, the police officers had secured a search warrant beforehand and had time to prepare. Yet SPO1 Agadier admitted that marking was done only at the police station, even though an inventory receipt was prepared while still inside the house. This was the first gap in the chain.

Section 21 of RA 9165 and Its Implementing Rules

The Court also examined compliance with Section 21 of RA 9165, which requires the apprehending team, immediately after seizure, to physically inventory and photograph the drugs in the presence of the accused or his representative, a representative from the media, the Department of Justice, and an elected public official. The implementing rules provide that non-compliance does not automatically mean the identity of the drugs has been compromised, so long as the prosecution shows that the integrity and evidentiary value of the evidence were preserved.

In this case, the police failed to give Alcuizar a copy of the inventory receipt. More troubling was the testimony of a barangay tanod who signed the receipt. He and the barangay captain arrived late, after the alleged shabu were already on top of a table. The tanod said he was merely asked to sign and was not told that the document referred to the recovered shabu. No other signatories were presented to authenticate the inventory.

The Second Gap: Vague Custody Testimony

The first gap was compounded by SPO1 Agadier's vague recollection of how the drugs were transferred. He testified that he turned over the items to SPO1 Navales, but did not specify whether this happened inside the house or at the police station, and it was unclear who held the drugs while in transit. SPO1 Navales never testified to confirm the transfer.

The Court held that these two gaps — the failure to mark immediately after seizure and the unclear custody of the drugs from the house to the crime laboratory — substantially affected the identity of the corpus delicti. The presumption of possession arising from the drugs being found in Alcuizar's house was not conclusive. With serious doubts about whether the prohibited drugs were indeed found in his house, the Court acquitted Alcuizar.

Practical Takeaways

• Compliance with the chain of custody rule is not optional. Police officers must mark seized drugs immediately upon confiscation, or at the nearest police station only in warrantless arrests, and must document every transfer of custody.
• Inventory and photograph requirements matter. Under Section 21 of RA 9165, the inventory must be done immediately after seizure in the presence of the accused or his representative, a media representative, a DOJ representative, and an elected public official, who should all sign and receive copies.
• Witnesses must actually witness. A barangay official who arrives late and merely signs a receipt does not cure defects in the chain of custody.
• The prosecution bears the burden of proving identity of the corpus delicti. Any unexplained gap that creates reasonable doubt over whether the drugs presented in court are the same drugs seized will result in acquittal.
• **Presumptions