G.R. No. 199875 ; November 21, 2012
PEOPLE OF THE PHILIPPINES, Plaintiff-Appellee, vs. EDWIN ISLA Y ROSSELL, Accused-Appellant.

FACTS

On July 21, 1997, AAA was inside her rented house in Quezon City with her two young children when accused-appellant Edwin Isla entered. Isla poked a knife at her neck, pulled her into a bedroom, and raped her. During the assault, AAA’s children were present. After the rape, Isla stabbed AAA twice, inflicting serious wounds. AAA managed to disarm him and throw the knife out a window, after which Isla fled. AAA was hospitalized for five days. The medico-legal examination confirmed injuries consistent with her account, including congestions and abrasions in her genitalia, though the test for spermatozoa was negative. The attending physician testified that her stab wounds were severe and potentially fatal, prevented only by timely medical intervention.
Isla admitted to raping and stabbing AAA but invoked the defense of insanity. He claimed he and AAA had a prior two-month illicit relationship and that he could not understand why he stabbed her. The defense presented two psychiatric experts from the National Center for Mental Health who testified that Isla was suffering from a major depressive disorder with psychotic features. However, they could not definitively state that this condition existed at the time of the crime on July 21, 1997, as their examinations were conducted much later, after Isla was jailed.

ISSUE

The core issue is whether the defense of insanity was sufficiently proven to exempt accused-appellant Edwin Isla from criminal liability for the crimes of Rape and Frustrated Murder.

RULING

The Supreme Court affirmed the conviction but modified the crime from Frustrated Murder to Frustrated Homicide. It rejected the defense of insanity. The legal logic is anchored on the principle that insanity is an affirmative defense, and the burden of proof rests on the accused to establish it by clear and convincing evidence. The Court emphasized that the accused must prove that he was completely deprived of intelligence or freedom of will at the exact time of the commission of the offense.
The defense failed to meet this burden. The testimonies of the psychiatric experts were deemed insufficient because they could not conclusively prove that Isla’s alleged mental disorder existed on July 21, 1997. Their examinations were conducted post-facto, and their findings pertained to his condition while in detention, not at the critical moment of the crime. The Court found that Isla’s actions—using a knife to subdue AAA, threatening her to secure compliance, fleeing after the incident, and his own admission of the acts—demonstrated a clear awareness of his deeds and a conscious effort to execute them. This logical sequence of events indicated he was not in a state of complete deprivation of reason. Consequently, the defense of insanity was not established. The Court upheld the conviction for Rape and, finding no evidence of treachery or intent to kill beyond the stabbing itself, modified the other conviction to Frustrated Homicide.