G.R. No. L-69666, January 23, 1992
People of the Philippines vs. Gumercindo Quilaton y Ebarola

FACTS

The accused-appellant, Gumercindo Quilaton, was convicted of murder for the killing of Rolando Manahan. The prosecution evidence established that on the evening of August 16, 1983, a heated argument ensued between Quilaton and Manahan, the officer-in-charge of the PROFEM office where Quilaton previously worked. Manahan had admonished Quilaton for using the office as sleeping quarters. After Quilaton left with his belongings, Manahan followed him onto a provincial road. An eyewitness, Lamberto Abugan, saw the continuing altercation, during which Quilaton pulled out a fan knife, declared his intent to kill, and chased Manahan as he fled. Manahan was later found dead with multiple stab wounds.
Quilaton claimed self-defense, presenting a different version where he alleged that Manahan was the armed aggressor who attacked him first. He testified that he was able to wrest the weapon away and stabbed Manahan instinctively. He further claimed he was on his way to surrender when arrested. The trial court rejected this defense, found the killing was qualified by treachery, and convicted him of murder.

ISSUE

The principal issue is whether the accused-appellant acted in lawful self-defense. Corollary to this is whether the qualifying circumstance of treachery was present to sustain a conviction for murder.

RULING

The Supreme Court modified the trial court’s decision, finding the appellant guilty of homicide instead of murder. The Court held that the essential elements of self-defense were not established. For self-defense to prosper, the accused must prove unlawful aggression, reasonable necessity of the means employed, and lack of sufficient provocation. The appellant failed to prove unlawful aggression on the part of the victim. The prosecution eyewitness account was more credible, showing it was Quilaton who produced the knife and initiated the fatal attack after a verbal altercation, with the victim attempting to flee. The claim that the victim was armed was uncorroborated and inconsistent with the evidence.
Furthermore, the Court ruled that treachery was not present. The qualifying circumstance of treachery requires that the means of execution be deliberately adopted to ensure the attack without risk to the attacker. The confrontation arose from a sudden heated argument on the road. The attack was not shown to be so sudden and unexpected that it deprived the victim of any chance to defend himself, especially since the altercation was face-to-face and the victim was able to turn and run. Thus, the killing lacked the qualifying circumstance for murder. The conviction was properly for homicide. The Court applied the Indeterminate Sentence Law and modified the awards for damages accordingly.