G.R. Nos. L-37201-02, L-37424, L-38929. March 3, 1975.
CLEMENTE MAGTOTO, petitioner, vs. HON. MIGUEL M. MANGUERA, et al., respondents. MAXIMO SIMEON, et al., petitioners, vs. HON. ONOFRE A. VILLALUZ, et al., respondents. PEOPLE OF THE PHILIPPINES, petitioner, vs. HON. ASAALI S. ISNANI, et al., respondents.

FACTS

These consolidated cases involve petitioners who made extrajudicial confessions during custodial police investigations conducted prior to the effectivity of the 1973 Constitution. The confessions were obtained without the assistance of counsel. The petitioners sought to have these confessions excluded from evidence, arguing that the new constitutional provision under Article IV, Section 20—which mandates that any person under investigation “shall have the right to remain silent and to counsel, and to be informed of such right” and that any confession obtained in violation thereof is inadmissible—should be applied retroactively to their cases.
The prosecution, relying on long-standing jurisprudence, maintained the admissibility of the confessions. The prevailing doctrine before the 1973 Constitution was that extrajudicial confessions were admissible if voluntarily given, with the burden on the accused to prove coercion. The right to counsel was understood to attach formally from arraignment onwards, not during preliminary police interrogation. The trial courts admitted the confessions, leading to these petitions.

ISSUE

Whether the constitutional right to counsel during custodial investigation, as provided in Article IV, Section 20 of the 1973 Constitution, applies retroactively to confessions obtained before its effectivity.

RULING

The Court, through the concurring opinion of Justice Antonio, ruled that the new constitutional provision does NOT apply retroactively. The legal logic is anchored on principles of prospectivity, reliance interests, and the administration of justice. First, the 1973 Constitution contains no express statement or clear implication that this particular right is to operate retrospectively. Constitutional provisions are generally prospective unless the contrary is expressly declared or necessarily implied.
Second, at the time the confessions were taken, law enforcement officers justifiably relied on settled jurisprudence that permitted custodial interrogation without counsel, provided the confession was voluntary. To suddenly invalidate these confessions retroactively would penalize the State for actions that were lawful when performed, undermining public respect for judicial authority and stability in the law.
Third, a retroactive application would severely disrupt the administration of justice. It would impair the effective prosecution of numerous cases finally decided under the old rule, potentially requiring retrials and creating an overwhelming burden on the judiciary. The purpose of the new rule—to deter future lawless police conduct—is adequately served by its prospective application. Therefore, the confessions in question, obtained under the former legal regime, remain admissible in evidence. The Court affirmed the challenged orders admitting the extrajudicial confessions.