G.R. No. L-32390 December 28, 1973
THE PEOPLE OF THE PHILIPPINES, plaintiff-appellee, vs. CLEMENTE AQUINO, defendant-appellant.

FACTS

Clemente Aquino was convicted of murder by the Court of First Instance of Bulacan for shooting Pedro Cruz four times on April 29, 1967. The prosecution presented three eyewitnesses, all co-employees of the victim at Farmont Mines. They testified that Aquino, a truck driver for a rival mining operation, rammed through a fence onto Farmont property. When Cruz drove his jeep to intercept the truck on a dry riverbed, alighted, and approached, Aquino immediately shot him without any prior altercation. The defense centered on Aquino’s plea of self-defense.
Aquino presented a contradictory account. He testified he did not enter Farmont property but used a separate passageway to the riverbed to avoid conflict. While negotiating this passage, he accidentally hit some bamboo posts. Later, Cruz aggressively blocked his path with a jeep, alighted, and approached while touching a bulge at his waist. Cruz then pulled out a balisong knife, stepped onto the truck’s running board, and attempted to stab Aquino. While leaning away, Aquino retrieved a gun from the tool box and fired in defense.

ISSUE

Whether the accused, Clemente Aquino, has successfully proven his plea of self-defense by clear and convincing evidence.

RULING

Yes. The Supreme Court reversed the conviction and acquitted Aquino, finding his plea of complete self-defense sufficiently established. The legal logic hinges on the principle that when an accused invokes self-defense, the burden of proof shifts to him to prove its elements—unlawful aggression, reasonable necessity of the means employed, and lack of sufficient provocation—by clear and convincing evidence. The Court found the prosecution’s evidence unreliable. Critical inconsistencies were noted in the testimony of the principal witness, Priscila Corpuz, between her court testimony and her earlier statements during the preliminary investigation, particularly regarding whether Aquino rammed a gate or merely struck some posts. Furthermore, the defense convincingly demonstrated the existence of an alternative passageway to the riverbed, which Aquino used, contradicting the prosecution’s claim of a forcible entry. This cast doubt on the prosecution’s narrative of initial aggression by Aquino. In contrast, Aquino’s detailed testimony, corroborated by witness Teofilo de Guzman and a sketch, credibly established that Pedro Cruz was the unlawful aggressor who attempted a deadly knife attack. Faced with this imminent peril, Aquino’s act of shooting was a reasonably necessary response to repel the aggression. The totality of evidence created reasonable doubt about his guilt, thereby warranting acquittal.