G.R. No. 223036 - People vs. Omamos y Pajo

On July 16, 2008, at about 1:45 in the afternoon at Carmen Public Market, Carmen, Cagayan de Oro City, the accused, Mike Omamos y Pajo, was allegedly engaged in an illegal sale of dangerous drugs.
The transaction involved a heat-sealed red plastic bag containing partially dried marijuana fruiting tops weighing 110.1 grams. Although the price was stated as P1,020.00, only a marked P20.00 bill (and a counterfeit P1,000.00 bill) was exchanged during the deal.

The operation was triggered by an informant’s tip that the accused would bring a large quantity of dried marijuana leaves from Talakag, Bukidnon.
A police team, led by PO3 Vicente and composed of officers including PO2 Pacampara, PO2 Tabalon, and others, executed a pre-planned buy-bust operation.
The informant, acting as a poseur-buyer, engaged with the accused at an agreed location near the City Economic Enterprise Department (CEED) office.
Upon initiation of the pre-arranged signal (removal of a bull cap), police officers swiftly closed in, identified themselves, and arrested the accused after informing him of his offense and constitutional rights.

The seized evidence (the bag containing marijuana) was handled by PO3 Manuel Pacampara who heat-sealed the bag, marked it “Exhibit-A MPO,” signed it, and noted the arrest date.
The item was subsequently subjected to chemical testing, with results confirming it as Cannabis sativa.
Essential procedures—such as the physical inventory, photographic documentation, and marking at the scene in the presence of the accused or his counsel—were either performed imperfectly or omitted, raising concerns about the chain of custody.

Prosecution witnesses, including PSI Erma Condino Salvacion, PO3 Manuel Pacampara, PO3 Joel Tabalon, PO3 Jimmy Vicente, and SPO4 Jerry Abella, provided accounts affirming the sequence of events during the buy-bust operation.
Documentary evidences presented included a Letter Request for Laboratory Examination, two Chemistry Reports, a Pre-operation Report, and a Coordination Form, reinforcing the state’s version of events.

The accused denied the charges and claimed that on the morning of July 16, 2008, he was en route to a fiesta celebration, only to be accosted by two inebriated men who forcibly abducted him.
He further alleged that he was coerced during his detention at the Maharlika Police Station, forced to mimic a drug transaction by holding both a P20.00 bill and marijuana under duress, and that his constitutional rights were not properly read or observed.

During trial, the court gave full credence to the testimonies of the police officers and the documentary evidence, leading to a conviction under Section 5, Article II of Republic Act 9165.
The trial court sentenced Mike Omamos y Pajo to life imprisonment and imposed a fine of P1,000,000.00, also granting credit for the period of his preventive detention.
The Court of Appeals later affirmed the conviction despite the accused’s contention that the chain of custody for the repugnant evidence was defective.
On appeal, the accused challenged the sufficiency of the evidence, particularly arguing that the lapses in the chain of custody cast doubt on the integrity of the seized drug as the corpus delicti.

Whether the arresting police officers complied with the mandatory procedures for marking, inventorying, and photographing the seized dangerous drugs as required under Section 21 of RA 9165 and its Implementing Rules and Regulations.
Whether the failure to conduct these procedures in the presence of the accused (or his representative) compromised the evidentiary integrity of the corpus delicti.

Whether the breach in the chain of custody—and the resulting reasonable doubts about the identity and integrity of the seized drug—warrants acquittal in light of the presumption of innocence.
Whether the state’s presumption of regularity in the performance of official duties is negated by clear procedural shortcomings in the handling of evidence.