Title
People vs. Mariano
Case
G.R. No. 247522
Decision Date
Feb 28, 2022
A buy-bust operation led to Nora's arrest for illegal drug sale and possession, but the Supreme Court acquitted her due to broken chain of custody and procedural lapses under RA 9165.
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Case Summary (G.R. No. 247522)

Petitioner / Respondent

Petitioner (People): prosecuted Nora for violations of Sections 5 (Illegal Sale) and 11 (Illegal Possession) of Article II of Republic Act No. 9165. Accused-Respondent: Nora, who pleaded not guilty, testified in denial of the prosecution’s account.

Key Dates

Date of operation and alleged offenses: August 6, 2011. Inventory was conducted August 8, 2011. RTC decision convicting Nora: March 21, 2017. CA decision affirming conviction (with penalty modification): August 16, 2018. Supreme Court decision reversing and acquitting: February 28, 2022.

Applicable Law and Governing Constitution

Governing constitution: 1987 Philippine Constitution (cases decided after 1990 apply). Statutory law directly at issue: Republic Act No. 9165 (Comprehensive Dangerous Drugs Act of 2002), particularly Sections 5 (illegal sale) and 11 (illegal possession) and Section 21 (custody and disposition of seized drugs). Implementing Rules and Regulations of RA 9165 and the amendment under RA 10640 (effective July 15, 2014) are discussed; because the events occurred in 2011, the original (pre-amendment) Section 21 provisions applied.

Prosecution Version — Buy‑Bust Operation and Seizure

A confidential informant identified Nora and a co-accused on August 6, 2011. PO3 Tutor acted as poseur-buyer with marked P1,000.00; after introduction, the co-accused received the marked bill and gave it to Nora, who allegedly produced one elongated sachet and handed it to PO3 Tutor. PO3 Tutor signaled and the backup team arrested Nora and her co-accused. A body search at arrest allegedly produced one big sachet (1.0923 g), forty elongated sachets (3.5437 g), and cash of P10,150.00; seized items were placed in separate evidence pouches and custody was claimed by PO3 Tutor. Inventory, marking, and photographs were performed at the police station on August 8, 2011 in the presence of certain witnesses (Brigada News, Barangay Chairman, DOJ representative). PO3 Tutor delivered the items and a Letter Request for Laboratory Examination to the PNP Crime Laboratory; PO1 Marron received the exhibits and PSI Fabian conducted qualitative testing, which yielded positive results for methamphetamine hydrochloride (Chemistry Report No. D-128-11). Items were then supposedly placed with SPO2 Alcozar as crime lab evidence custodian.

Formal Charges and Trial Posture

Two Informations were filed: Criminal Case No. 70,390-11 (illegal sale — one sachet weighing 0.1569 g) and Criminal Case No. 70,389-11 (illegal possession — total weight alleged 4.6360 g composed of the big sachet and forty elongated sachets). Nora pled not guilty and testified she had been shopping, was approached and arrested by men in plain clothes, and that body search initially conducted by a female officer was negative; she alleged a subsequent observation of her co-accused carrying a cellophane plastic. She also testified to negative drug test results two days after arrest.

RTC Ruling

The Regional Trial Court found Nora guilty beyond reasonable doubt of illegal sale and illegal possession, crediting PO3 Tutor’s testimony and finding that the prosecution established an unbroken chain of custody. The RTC justified delayed inventory (conducted August 8) because the buy‑bust was on a Saturday and witnesses were allegedly unavailable. The RTC imposed the applicable penalties and directed handling of seized shabu as provided under RA 9165.

Court of Appeals Ruling

The Court of Appeals denied Nora’s appeal, affirmed the RTC’s conviction on both counts, and modified the penalty for illegal possession to a narrower indeterminate range. The CA accepted the prosecution’s evidence and PO3 Tutor’s testimony and upheld the preservation of chain of custody as sufficient.

Issues on Appeal to the Supreme Court

Primary legal issue: whether Nora was guilty of illegal sale and illegal possession of dangerous drugs, with particular scrutiny of whether the prosecution proved corpus delicti and an unbroken chain of custody of the seized items. Nora argued insufficient proof of buyer/seller identity, possession, and chain of custody. The People contended the prosecution established all elements through testimonial and documentary evidence and that the police substantially complied with required custody procedures.

Supreme Court’s Standard of Review and Initial Observations

The Supreme Court acknowledged that appellate review in criminal cases opens the entire case for review and that lower-court findings are generally respected but can be reversed if significant facts affecting the outcome were overlooked or misapplied. The Court accepted that the elements of illegal sale and illegal possession, as conceptually formulated, were met by the prosecution’s evidence insofar as identification of buyer/seller, delivery, and recovery were concerned.

Central Legal Requirement: Identity of Corpus Delicti and Chain of Custody

The Court emphasized that establishing the identity and integrity of the seized drugs — the corpus delicti — beyond reasonable doubt requires proof of an unbroken chain of custody. It invoked the four-link framework, derived from People v. Kamad and related precedents, requiring proof of: (1) seizure and marking of the illegal drug at the time of recovery; (2) turnover of the seized item from the apprehending officer to the investigating officer; (3) turnover by the investigating officer to the forensic chemist for examination; and (4) custody and eventual submission by the forensic chemist to the court. Failure in any of these links raises reasonable doubt as to whether the item tested and later presented is the same item seized from the accused.

Factual and Legal Deficiencies Identified by the Court

The Supreme Court found multiple, material lapses in the prosecution’s proof of the chain of custody:

  • First Link (Seizure and Marking): PO3 Tutor admitted he did not immediately mark the forty elongated sachets at the place of apprehension; markings were made later at the police station. The prosecution failed to explain how the sachets were segregated or identified from one another. Because the sachets were mingled and unmarked at the scene, the prosecution could not reliably identify which sachet was the object of the sale and which comprised the remainder of the seized items. This deficiency is critical because the weights of specific sachets determine proper penalties.

  • Third Link (Turnover to Forensic Chemist): Although PO3 Tutor testified that he personally delivered the specimens and signed a “letter request for laboratory examination,” the record contained no informative details on how PO1 Marron handled or preserved the identity of the seized drugs while in his possession before turning them over for testing. There was no testimonial or documentary detail of intermediate handling.

  • Fourth Link (Forensic Custody and Presentation): The court found inadequate evidence on how PSI Fabian handled and preserved the identity of the seized drugs before and after qualitative examination, and there was no clear account of custody up to presentation in court. The absence of documentation or detailed testimony created a gap allowing for the possibility of tampering, alteration, or substitution.

  • Inventory and Section 21/IRR Non-Compliance: The inventory and photography required under Section 21 of RA 9165 and the IRR were conducted on August 8, 2011, two days after the arrest. The statutory and regulatory scheme mandates immediate inventory and marking in the pres

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