Conspiracy and Treachery: How the Supreme Court Weighed Guilt in the Murder of Juliano Mampo

The killing of Juliano Mampo in Kidapawan in 1997 ended with three men sentenced to death by the trial court. On automatic review, the Supreme Court in People of the Philippines v. Jayson Berdin, Castro Calejanan and Luciano Saluyo, G.R. No. 137598 (November 28, 2003), affirmed their guilt for murder but lowered the penalty to reclusion perpetua. The case is a clear lesson on two ideas that decide many Philippine criminal cases: conspiracy and treachery.

What happened that night

On the evening of June 10, 1997, Juliano Mampo and his son Jemuel visited the house of Luciano Saluyo in Barangay Amas, Kidapawan. Jayson Berdin and Castro Calejanan were there. After about an hour of conversation, father and son walked home, with Jemuel ahead.

Jemuel testified that the three men followed them. When he turned around, he saw Calejanan holding his father's left hand and Saluyo holding his right. Berdin then hacked his father's head twice with a bolo. As the victim was about to fall, Saluyo and Calejanan held him up, and Berdin grabbed his head and slashed his neck.

A second witness, Rudy Yamilo, saw the same attack from about ten meters away: Berdin hacking the victim while the other two held his arms.

The municipal health officer, Dr. Roberto Omandac, found two hack wounds on the head — one 11 inches long and 3 inches deep — and an 8½-inch wound on the neck that severed the windpipe and major blood vessels. That neck wound caused death.

The defense: self-defense, alibi, and denial

Berdin admitted killing Mampo but claimed self-defense. He said the victim came to his house, threatened to kill him, hacked his door, and attacked him first; he retaliated with his bolo. Saluyo and Calejanan denied participation. They claimed they were home that night and that only Berdin was involved.

The Court rejected these defenses. When self-defense is raised, the accused must prove three things: that he was not the unlawful aggressor, that there was no sufficient provocation on his part, and that he used reasonable means to repel the attack. Berdin failed on all counts. The Court noted that if his life were truly in peril, he could not have calmly tried to talk the victim down. It also stressed that the nature, number, and location of the wounds — including a near-severed neck — were inconsistent with a plea of self-defense.

As for Saluyo and Calejanan, the two eyewitnesses positively identified them as participants. Positive identification, when categorical and consistent and untainted by ill motive, prevails over alibi and denial.

Conspiracy: acting with one purpose

The Court held that all three men conspired to kill the victim. Conspiracy exists when two or more persons agree to commit a felony and decide to commit it. It may be inferred from the acts of the accused showing a common purpose, a concert of action, and a community of interest.

Here, no prior agreement was proved, but the manner of the killing showed it. Calejanan and Saluyo held the victim's hands while Berdin hacked him; when the victim began to fall, they held him up again so Berdin could slash his neck. Their acts showed unity of purpose. Because of the conspiracy, the Court explained, it was no longer necessary to determine who struck the fatal blow — all conspirators are liable as principals.

Treachery: a qualifying circumstance

Treachery was also present. There is treachery when the offender employs means or methods that tend directly to ensure the crime's execution without risk to himself from any defense the victim might make. Two elements must concur: the means employed gave the victim no opportunity to defend himself or retaliate, and that means was deliberately chosen.

The Court found both. The victim was attacked from behind, suddenly and without provocation, unaware that he was being followed. The deliberate holding of his arms confirmed that the method was consciously adopted. Treachery qualified the killing as murder.

Why the penalty was reduced

The trial court imposed death, but the Supreme Court found no other aggravating circumstance proven to justify it. The Court applied the rule that when the law prescribes a penalty composed of two indivisible penalties and there are neither mitigating nor aggravating circumstances, the lesser penalty is imposed. The Court therefore sentenced the appellants to reclusion perpetua. The decision cites this rule as Article 63(2) of the Revised Penal Code, but that provision itself is not reproduced in the materials available here; readers should consult the Revised Penal Code directly for its exact text.

On damages, the Court ordered the three appellants to pay the victim's heirs, jointly and severally: P50,000 as civil indemnity, P50,000 as moral damages, and P25,000 as temperate damages in lieu of actual damages, following People v. Abrazaldo (G.R. No. 124392, February 7, 2003).

Practical takeaways

• Self-defense is an admission of killing. The accused must prove all three elements by clear and convincing evidence, and the physical evidence — the number and location of wounds — often decides the claim.
• Conspiracy need not be proven by a prior agreement. It can be inferred from how the crime was carried out, including acts of holding, blocking, or assisting.
• Once conspiracy is established, every conspirator is liable as a principal, even the one who did not strike the fatal blow.
• Treachery requires both an unexpected attack that left the victim helpless and a deliberate choice of that method.
• Even in a conviction for murder, the penalty depends on the aggravating circumstances actually proven; absent others, the lesser indivisible penalty applies.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.