People vs. Valencia y Lorenzo and Antipuesto

A conviction for illegal sale of dangerous drugs cannot stand when the chain of custody is broken by an unauthorized alteration of the documentary record of the seized item's marking during its transfer between custodians, as this casts reasonable doubt on the corpus delicti.

Accused-appellants Francis Valencia and Ryan Antipuesto were charged with illegal sale of 12.53 grams of methamphetamine hydrochloride (shabu) following a buy-bust operation in Dumaguete City on January 16, 2016. The prosecution alleged that Valencia, acting on Antipuesto's instructions, handed the drug to the poseur-buyer, PO1 Crisanto Panggoy, in exchange for PHP 10,000.00. The defense claimed frame-up and alibi, alleging Valencia was illegally arrested in his boarding house and that Antipuesto was elsewhere at the time.

• The Buy-Bust Operation: Acting on reports, police officers conducted surveillance on Antipuesto. A poseur-buyer (PO1 Panggoy) was introduced to him, and a sale was arranged for January 16, 2016, at the Dumaguete City Port exit gate.
• The Seizure and Marking: At the meeting, Antipuesto directed Valencia, who produced a heat-sealed plastic sachet of shabu. After the exchange, Panggoy arrested Valencia (Antipuesto escaped). Panggoy immediately marked the sachet "FLV/RA-BB-01-16-16" at the place of arrest and placed it in a brown evidence envelope.
• Inventory at the Police Station: Due to congestion at the port, the team conducted the inventory and photographing at the Dumaguete City Police Station. Required witnesses (elected official, media, DOJ) were present there, not at the place of seizure.
• Transfer to Crime Lab and Fatal Alteration: PO1 Panggoy delivered the sealed envelope to the crime laboratory. PO3 Michelle Cañete received it and noted that the marking on the physical sachet ("FLV/RA-BB-01-16-16") did not match the marking stated in the Letter Request ("FLV/RA-BB-01-16-2016"). She allowed Panggoy to alter the Letter Request by striking out "20" to make it read "16," thereby reconciling the document with the specimen.
• Forensic Examination: The specimen tested positive for shabu. The defense presented alibi and frame-up witnesses, which the trial court discredited.

• Compliance with Section 21: The People argued there was substantial compliance with the chain of custody rule. Conducting the inventory at the police station was justified by the impracticability caused by exiting vehicles at the port.
• Integrity Preserved: The prosecution maintained that the integrity and evidentiary value of the seized drugs were preserved through a continuous chain, established by testimonial and documentary evidence.

• Broken Chain of Custody: Accused-appellants argued that the arresting officers violated Section 21 of RA 9165 by not conducting the inventory and photography at the place of arrest and by not having the required witnesses present there.
• Fatal Discrepancy in Marking: They highlighted the alteration of the marking in the Letter Request as a fatal flaw that broke the chain of custody and cast doubt on the identity of the corpus delicti.
• Invalid Buy-Bust: They also questioned the validity of the operation, citing inconsistencies and lack of prior surveillance.

• Chain of Custody Compliance: Whether the prosecution established an unbroken chain of custody for the seized dangerous drugs, specifically regarding compliance with Section 21 of RA 9165 and the integrity of the marking and documentation.
• Sufficiency of Evidence: Whether the guilt of accused-appellants was proven beyond reasonable doubt.

• Chain of Custody Compliance: The prosecution failed to prove an unbroken chain. The inventory and photography were conducted at the police station without a sufficient, specific justification for not doing so at the place of seizure, violating the immediacy requirement of Section 21. More critically, the alteration of the marking in the Letter Request while the specimen was in the custody of the crime laboratory broke the third link in the chain (turnover to the forensic chemist). This alteration created uncertainty that the specimen examined was the same one seized from the accused.
• Sufficiency of Evidence: Due to the fatal breach in the chain of custody, the identity and integrity of the corpus delicti were not proven beyond reasonable doubt. Accordingly, the conviction could not stand, and accused-appellants were acquitted.

• Chain of Custody Rule — This rule requires testimony about every link in the chain from seizure to court presentation, describing how each handler received, maintained, and transferred the item, and the precautions taken to prevent alteration. An unbroken chain is indispensable when the evidence is not readily identifiable or is susceptible to tampering.
• Section 21, RA 9165 (as amended by RA 10640) — The procedure mandates: (1) immediate physical inventory and photography at the place of seizure (or nearest police station if impracticable) in the presence of the accused and required witnesses; (2) submission to the PDEA forensic lab within 24 hours; and (3) a saving clause for non-compliance under justifiable grounds, provided integrity is preserved.
• Marking as Critical First Link — Immediate marking at the place of seizure is crucial as it "preserves the integrity of the evidence as it enters the chain." The marking serves as the reference point for all subsequent handling.
• Burden to Justify Deviations — The prosecution must acknowledge, justify, and prove as a fact any deviation from Section 21 before invoking the saving clause. It cannot rely on the presumption of regularity.

• "Receipts showing the chain of custody cannot be altered or modified while the specimen is in transit to the next custodian. Even a minimal change in the marking stated in these documents is fatal to the identity and integrity of the corpus delicti."
• "The paper trail or receipts recording the movement of seized specimen are important evidence showing the chain of custody. These documents must accurately reflect the marking written on the confiscated drugs and the series of transfers."
• "Cañete had no personal knowledge whether the specimen submitted for testing was the same sachet seized from accused-appellants. Upon seeing that the actual marking on the specimen did not match the marking stated in the Letter Request, she should not have accepted the same. Allowing the alteration in the Letter Request broke the third link in the chain of custody."

• People v. Casa, G.R. No. 254208, August 16,2022 — Applied to explain the two-pronged test for invoking the saving clause (justifiable grounds + preserved integrity) and the requirements for resorting to an alternative venue for inventory.
• Nisperos v. People, G.R. No. 250927, November 29, 2022 — Cited to clarify that required witnesses need not witness the actual arrest but must be present at or near the place of operations.
• People v. Mallilin, 576 Phil. 576 (2008) — Referenced for the foundational definition and purpose of the chain of custody rule.
• Tumabini v. People, G.R. No. 224495, February 19, 2020 — Cited for the rule that seized items should be placed in an envelope or evidence bag to secure them from tampering.

• Section 5, Article II, Republic Act No. 9165 (Comprehensive Dangerous Drugs Act of 2002) — The substantive offense charged: illegal sale of dangerous drugs.
• Section 21, Article II, Republic Act No. 9165, as amended by Republic Act No. 10640 — The procedural requirement for the custody and disposition of seized dangerous drugs, including immediate inventory, photography, and the chain of custody. The Court found non-compliance with its immediacy and documentation requirements.

• Justice Alfredo Benjamin S. Caguioa
• Justice Jhosep Y. Lopez
• Justice Henri Jean Paul B. Inting
• Justice Antonio T. Kho, Jr.