Mendoza v. People

Summary

This Supreme Court case involved the acquittal of Joemarie Mendoza who was arrested during implementation of a search warrant against another person for possession of dangerous drugs and drug paraphernalia. The Court ruled that the search warrant was fundamentally invalid for violating the one-specific-offense rule as it covered violations of both RA 9165 (dangerous drugs) and RA 10591 (firearms). The Court emphasized that waiver of an illegal arrest does not extend to waiver of inadmissibility of evidence seized during such arrest. The plain view doctrine was found inapplicable since police had no lawful justification to be in the premises without the invalid search warrant. Additionally, the prosecution failed to comply with chain of custody requirements under Section 21 of RA 9165, specifically the absence of required witnesses from media or National Prosecution Service during inventory. The decision reinforces constitutional protections against unreasonable searches and seizures and the importance of strict compliance with procedural safeguards in drug cases, establishing that invalid search warrants cannot serve as basis for subsequent arrests and evidence collection.