Title
Tan y Sia vs. People
Case
G.R. No. 232611
Decision Date
Apr 26, 2021
Jasper Tan y Sia acquitted of drug charges due to lapses in buy-bust operation, chain of custody, and search warrant execution, rendering evidence inadmissible.
A

Case Digest (G.R. No. 241126)

Facts:

  • Charges and Information
    • Two Informations filed June 24, 2002 before RTC Dipolog City, Branch 6:
      • Criminal Case No. 11265 – Illegal sale of one sachet “shabu” (0.10 g) on June 22, 2002.
      • Criminal Case No. 11266 – Illegal possession of eight sachets “shabu” (2.74 g) on June 23, 2002.
    • Accused Jasper Tan y Sia pleaded not guilty; trial ensued.
  • Trial Proceedings and Lower Courts’ Decisions
    • Prosecution witnesses: PSI Susan Cayabyab (forensic chemist) and PO2 Jose Calibugar (buy-bust officer).
    • Buy-bust operation: marked money given to confidential informant; transaction observed 10–15 m away; accused arrested; search warrant executed in accused’s room with barangay captain as sole witness; seized items tested positive for methamphetamine.
    • Defense: denial and frame-up.
    • RTC Decision (Nov 10, 2015): convictions in both cases; indeterminate sentences and fines imposed; confiscation of drugs.
    • CA Decision (Feb 14, 2017): affirmed conviction with modified penalties.
    • Petitioner’s appeal to SC: assailed validity of buy-bust, search warrant, chain of custody, and sufficiency of evidence.

Issues:

  • Buy-bust operation
    • Whether the “objective test” details were established.
    • Whether absence of poseur-buyer’s testimony vitiates operation’s validity.
  • Chain of custody
    • Whether the prosecution proved an unbroken custody trail of seized drugs.
    • Whether discrepancies in marking, turnover, weighing, and lab transmittal undermine evidence integrity.
  • Search warrant and execution
    • Whether the warrant’s description of premises was sufficiently specific.
    • Whether search in absence of lawful occupant or proper witnesses violated Rule 126.
  • Sufficiency of evidence
    • Whether the prosecution proved guilt beyond reasonable doubt.
    • Whether constitutional presumption of innocence was overcome.

Ruling:

  • (Subscriber-Only)

Ratio:

  • (Subscriber-Only)

Doctrine:

  • (Subscriber-Only)

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