G.R. No. 234196 , November 21, 2018
Jonathan Mendoza y Esguerra, Petitioner, v. People of the Philippines, Respondent.

FACTS

Petitioner Jonathan Mendoza was charged with Illegal Possession of Firearm and Ammunition under P.D. No. 1866, as amended. The prosecution alleged that on August 31, 2006, police officers at a checkpoint flagged down a motorcycle driven by Mendoza for having no license plate and riders not wearing helmets. As they approached, PO1 Pagcaliwagan testified he saw Mendoza take a firearm and cover it with a bag, leading to his arrest and the seizure of a .45 caliber pistol, magazines, and ammunition. Mendoza denied ownership and claimed the items were illegally seized.
The defense presented a different version. Mendoza testified that after a drinking session, he and two friends were stopped by police, who then conducted a search of the motorcycle without any lawful cause. A defense witness, Anthony Carpio, testified that the seized firearm was actually his, that he had placed it under the motorcycle seat without Mendoza’s knowledge, and that he later presented his license for it to the police. The Regional Trial Court (RTC) convicted Mendoza, finding the search incidental to a lawful arrest after seeing the firearm. The Court of Appeals (CA) affirmed the conviction but modified the penalty, ruling the initial traffic violations justified the search.

ISSUE

Whether the Court of Appeals erred in affirming Mendoza’s conviction for illegal possession of firearm and ammunition.

RULING

The Supreme Court GRANTED the petition and ACQUITTED Jonathan Mendoza. The Court found that the prosecution failed to prove his guilt beyond reasonable doubt. The legal logic centered on the validity of the warrantless search and seizure. For a valid search incidental to a lawful arrest under Rule 126, Section 13 of the Rules of Court, the arrest must precede the search, and the arrest itself must be lawful. Here, the arresting officers testified they stopped the motorcycle for traffic violations—lack of a license plate and non-use of helmets. However, these are not crimes punishable by arrest under the law but are infractions where the procedure is merely to confiscate the driver’s license and issue a temporary receipt. Therefore, there was no lawful arrest that could justify a warrantless search of the person or vehicle.
Consequently, the subsequent search and seizure were illegal. The firearm and ammunition, being the fruits of an unlawful search, are inadmissible as evidence under the exclusionary rule. With this crucial evidence excluded, the prosecution’s case collapses. The positive testimony of the police officer regarding seeing Mendoza hide the gun loses its evidentiary foundation, as it was inextricably linked to the illegal search. The Court emphasized that when there is reasonable doubt, the constitutional presumption of innocence prevails. Since the prosecution relied on evidence obtained from an invalid search, it failed to meet the burden of proof, necessitating acquittal.