People v. Rosalino Dungo

Summary

Rosalino Dungo was charged with murdering Mrs. Belen Macalino Sigua, a Department of Agrarian Reform employee, on March 16, 1987. The accused stabbed the victim multiple times at her office after concealing a knife in an envelope. The defense claimed insanity due to organic mental disorder from a stroke suffered while working abroad. Expert witnesses testified the accused was psychotic before, during, and after the crime. However, the Supreme Court affirmed the murder conviction, finding the defense failed to prove insanity beyond reasonable doubt. The Court noted the accused's rational behavior in confronting the victim's husband weeks earlier and his awareness when stating he killed the victim. The presumption of sanity under law was not overcome by sufficient evidence.