Villasana v. People

Summary

The Supreme Court acquitted Joseph Villasana of illegal possession of dangerous drugs, reversing his conviction by lower courts. The Court found that his warrantless arrest was invalid as the arresting officers failed to comply with the 'overt act test' - they could not reasonably observe criminal activity from their distant position through a tinted windshield at night. Additionally, the police committed serious procedural violations in handling the seized evidence: failure to immediately mark the drugs in the accused's presence, noncompliance with mandatory inventory and photographing requirements under Section 21 of RA 9165, and discrepancies in evidence markings that broke the chain of custody. These violations created reasonable doubt about the integrity of the evidence, making the illegally seized drugs inadmissible and warranting acquittal. The case emphasizes strict adherence to constitutional protections against unreasonable searches and seizures and procedural safeguards in drug cases.