People vs. Wong Chuen Ming, 256 SCRA 182 (1996)
Whether the signatures of accused on the boxes, as well as on the plastic bags containing shabu, are admissible in evidence.
The Court holds that the signatures of accused on the boxes, as well as on the plastic bags containing "shabu", are inadmissible in evidence. A careful study of the records reveals that accused were never informed of their fundamental rights during the entire time that they were under investigation. Specifically, accused were not informed of their Miranda rights i.e. that they had the right to remain silent and to counsel and any statement they might make could be used against them, when they were made to affix their signatures on the boxes of Alpen Cereals while they were at the NAIA and again, on the plastic bags when they were already taken in custody at Camp Crame. By affixing their signatures on the boxes of Alpen Cereals and on the plastic bags, accused in effect made a tacit admission of the crime charged for mere possession of "shabu" is punished by law. These signatures of accused are tantamount to an uncounselled extra-judicial confession which is not sanctioned by the Bill of Rights (Section 12, Article III, 1987 Constitution). They are, therefore, inadmissible as evidence for any admission wrung from the accused in violation of their constitutional rights is inadmissible against them. The fact that all accused are foreign nationals does not preclude application of the "exclusionary rule" because the constitutional guarantees embodied in the Bill of Rights are given and extend to all persons, both aliens and citizens.