G.R. No. L-32978 October 30, 1980
THE PEOPLE OF THE PHILIPPINES, plaintiff-appellee, vs. ANDRES MAGALLANO, defendant-appellant.

FACTS

The accused-appellant, Andres Magallano, was charged with parricide for strangling his lawful wife, Exequiela Costa, on September 29, 1968. He voluntarily surrendered to the police, accompanied by his father, and confessed to the killing, which stemmed from his suspicion of his wife’s infidelity. The police investigation and witness testimony corroborated his detailed confession and led to the discovery of the victim’s body, with autopsy results confirming death by asphyxia due to strangulation. Prior to trial, the defense raised the issue of the accused’s sanity. Consequently, the trial court ordered a psychiatric examination. The Davao Regional Mental Hospital submitted reports based on multiple interviews, indicating the accused was coherent, relevant, well-oriented, and in good contact with his environment, with no observed hallucinations or delusions. Based on these medical findings, the court found him fit for trial.
During the trial, the defense centered on the claim of insanity at the time of the crime. The defense presented the accused’s father and a neighbor who testified to the accused’s occasional strange behavior and a family history of mental illness. A defense psychiatrist, Dr. Mariano B. Lara, opined that the accused was suffering from “Schizophrenia, paranoid type” and was insane at the time of the offense. However, his diagnosis was largely based on hypothetical questions and information provided by the defense, not on a personal examination of the accused.

ISSUE

Whether or not the defense of insanity was sufficiently established to exempt the accused from criminal liability for the crime of parricide.

RULING

The Supreme Court sustained the conviction and affirmed the trial court’s judgment. The legal logic is anchored on the principle that insanity is an affirmative defense, and the burden of proof rests heavily upon the party invoking it. The Court emphasized that the presumption under the law is that every person is sane and responsible for their actions. This presumption must be overcome by clear and convincing evidence of complete deprivation of intelligence, reason, or discernment at the very moment of committing the crime.
The Court found that the defense failed to discharge this burden. The prosecution’s evidence, including the accused’s own coherent and detailed confession, his rational conduct in surrendering, and the official psychiatric reports concluding he was fit for trial, strongly indicated sanity. In contrast, the defense psychiatrist’s testimony was deemed insufficient and unreliable because it was not based on a direct examination of the accused but on hypotheticals and hearsay accounts. The testimony of lay witnesses regarding occasional odd behavior was insufficient to prove legal insanity, as the law requires a complete absence of intellectual faculty. The Court ruled that the defense did not present proof of a total deprivation of reason at the precise time of the crime. Therefore, the exempting circumstance of insanity was not established, and the accused was correctly held criminally liable for parricide.