G.R. No. 220145 , August 30, 2023
PEOPLE OF THE PHILIPPINES, PLAINTIFF-APPELLEE, VS. XXX, ACCUSED-APPELLANT.

FACTS

The case involves the rape of AAA, a mental retardate, by her brother-in-law, the accused-appellant XXX. XXX’s wife, who is AAA’s sister, was an eyewitness and the principal prosecution witness. Medical evidence showed the victim sustained injuries indicative of a definitive penetrating injury in her genitalia. The Information alleged the victim was a “mental retardate and therefore deprived of reason,” but did not allege her specific mental age, and no evidence of her exact mental age was presented at trial. The accused-appellant denied the accusation, claiming the victim embraced him and he elbowed her away, after which his wife appeared and accused him of rape. As a defense, he argued that even assuming he committed the crime, he should be exempt from criminal liability because he himself was suffering from mild mental retardation with a mental age of a nine-year-old. The trial court convicted XXX of rape, and the Court of Appeals affirmed the conviction.

ISSUE

The primary issue addressed in the concurring and dissenting opinion is whether the ponencia’s extensive discussion regarding the insanity defense was appropriate, given that the accused-appellant’s defense was more properly characterized as one of immaturity based on his claimed mental age, not insanity.

RULING

Justice Caguioa concurred in the result of affirming the conviction but dissented from the ponencia’s discussions on the insanity defense. The ruling holds that:
1. The conviction for rape under Article 266-A(1)(b) of the Revised Penal Code (carnal knowledge of a woman “deprived of reason”) is correct. Since there was no allegation and proof of the victim’s mental age, the conviction could not be for statutory rape under Article 266-A(1)(d), following the Court en banc’s ruling in People v. Castillo, which requires both allegation and proof of mental age for such a categorization.
2. The ponencia’s discussion on the exempting circumstance of insanity was unwarranted. The appropriate defense raised by the accused-appellant, based on his claim of having a mental age of nine, is the exempting circumstance of immaturity under Article 12, paragraphs 2 and 3 of the RPC, as amended by the Juvenile Justice and Welfare Act, not insanity under Article 12, paragraph 1.
3. Insanity and immaturity are distinct defenses. Insanity involves a complete deprivation of intelligence or freedom of the will, while immaturity revolves around the accused’s capacity for discernment based on mental age. The spirit of the distinctions made in People v. Quintos and People v. Castillo—where a victim’s mental age shifts the analysis from insanity to immaturity—should apply similarly when an accused raises his own mental age as a defense.