Chain of Custody in Drug Cases: When Delayed Marking Leads to Acquittal
The Supreme Court acquits a drug suspect over delayed marking of seized shabu, explaining the chain of custody rule under RA 9165.
In a significant ruling on drug offense prosecutions, the Supreme Court has clarified how strictly the chain of custody rule must be observed — and when a lapse in that chain can mean the difference between conviction and acquittal. The case of People v. Cabriole (G.R. No. 248418, May 5, 2021) shows that even when police conduct a valid buy-bust operation, the failure to immediately mark seized drugs can destroy the prosecution's case for illegal sale, while a properly documented chain can still support a conviction for illegal possession.
The Facts of the Case
On October 16, 2016, police operatives in Gingoog City conducted a buy-bust operation against Gabriel Campugan Cabriole and a companion. PO1 Doño, acting as poseur-buyer, handed a marked ₱500 bill to the companion, who gave it to Cabriole as payment for one sachet of shabu. Cabriole then handed the sachet to the companion, who passed it to PO1 Doño.
Upon receiving the drugs, PO1 Doño removed his sunglasses — the pre-arranged signal that the sale was consummated. Back-up officers moved in and arrested Cabriole, while his companion escaped. A search of Cabriole yielded three additional plastic sachets of shabu, the marked money, and aluminum foil strips.
The inventory was conducted in the presence of Cabriole, a media representative, and a barangay kagawad. The seized items were later submitted to the crime laboratory, which confirmed they contained methamphetamine hydrochloride, or shabu.
The Issues Raised
Cabriole appealed his conviction, raising two main issues: whether the removal of the poseur-buyer's sunglasses was a valid basis for a warrantless arrest, and whether the prosecution properly established the chain of custody of the seized drugs.
The Supreme Court's Ruling
The Court partially granted the appeal, acquitting Cabriole of illegal sale of drugs under Section 5 of Republic Act No. 9165, but affirming his conviction for illegal possession under Section 11.
On the warrantless arrest. The Court upheld the validity of the arrest. Pre-arranged signals are a recognized method of communicating the completion of a buy-bust transaction. Since Cabriole sold shabu in the presence of the poseur-buyer, the arrest was lawful under Section 5(a), Rule 113 of the Rules of Court, which allows warrantless arrest when an offense is committed in the presence of an officer. The subsequent search of Cabriole was likewise valid as an incident to a lawful arrest.
On the chain of custody for illegal sale. Here, the prosecution failed. The Court emphasized that marking is the first and most crucial step in proving an unbroken chain of custody. PO1 Doño admitted that he did not immediately mark the sachet he bought. Instead, he placed it in his right pocket, left the area, dropped off the confidential informant, blended with the crowd, and only later turned the item over to PO3 Javier for marking and inventory.
The Court found this "odd and irregular" handling of the seized item compromised its integrity. As the Court noted, keeping a seized drug in a police officer's pocket for an indefinite period creates a real risk of tampering, alteration, or substitution. The prosecution offered no justifiable ground for the non-compliance with the immediate marking requirement.
On the chain of custody for illegal possession. The Court affirmed the conviction, finding that the three sachets recovered from Cabriole's pocket were properly handled. PO3 Javier marked and inventoried them immediately after seizure in the presence of the required witnesses. He personally delivered them to the crime laboratory, where the forensic chemist received them, conducted the examination, tape-sealed and labeled the items, and turned them over to the evidence custodian. The Court noted that it is not necessary to present every person who handled the drugs; what matters is that the chain is clearly established and unbroken.
Practical Takeaways
- Immediate marking is critical. The moment drugs are seized, they must be marked. Delays — even of several minutes — can break the chain of custody and lead to acquittal.
- Proper handling matters. Keeping seized drugs in a police officer's pocket while moving to different locations raises doubts about the integrity of the evidence.
- Witnesses must be present. The inventory and photography must be conducted in the presence of the accused and the required witnesses — an elected public official and a representative of the National Prosecution Service or the media, under R.A. No. 10640.
- Non-compliance requires justification. While the law allows leniency for non-compliance under justifiable grounds, the prosecution must prove both the justification and that the integrity of the evidence was preserved.
- Not every handler must testify. The prosecution need not present every person who touched the drugs, as long as the chain of custody is clearly established.
This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.
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