Custodial Investigation | THE BILL OF RIGHTS

N. Custodial Investigation under the Bill of Rights (Philippines)

Custodial investigation refers to the stage where a person is taken into custody by law enforcement authorities, during which questioning is carried out to elicit information or confessions. In the Philippines, custodial investigation is a critical aspect of the protection of individual rights, as it pertains to a person's right against self-incrimination and other rights guaranteed under the Bill of Rights (Article III) of the 1987 Philippine Constitution.

1. Legal Framework Governing Custodial Investigation

The 1987 Philippine Constitution, particularly Section 12, Article III, lays down the rights of persons under custodial investigation. These are:

  1. Right to be Informed of Rights
    Before any questioning, a person must be informed of their rights, specifically:

    • The right to remain silent.
    • The right to have competent and independent counsel, preferably of their own choice.
    • The right against self-incrimination.
  2. Assistance of Counsel

    • If the person cannot afford a lawyer, one must be provided free of charge.
    • This lawyer must be independent and competent. The mere presence of a lawyer without independence (such as one provided by law enforcement authorities with conflicts of interest) can be grounds to invalidate the statements made during the investigation.
    • Under RA 7438, any confession or admission obtained without the assistance of counsel is inadmissible in evidence.
  3. Prohibition Against Torture, Force, Violence, Threats, or Intimidation

    • No torture, force, violence, threat, or intimidation may be used to extract information or confessions.
    • Secret detention places, solitary, incommunicado, or other similar forms of detention are strictly prohibited.
    • This is aligned with international human rights standards, such as those under the Convention Against Torture.
  4. Right to Communicate with Family and Counsel

    • The detainee has the right to communicate with their legal counsel, family, or friends.
    • This right helps prevent arbitrary detention and ensures the availability of legal assistance and support.
  5. Right to Waive Rights Only in Writing and in the Presence of Counsel

    • Any waiver of these rights must be made voluntarily, knowingly, and intelligently, and should be done in writing. Crucially, the waiver must be executed in the presence of the detainee’s lawyer.
  6. Confessions Obtained in Violation of Rights

    • Any confession or admission obtained in violation of the aforementioned rights (e.g., without informing the suspect of their rights or in the absence of counsel) is inadmissible as evidence in any judicial, quasi-judicial, or administrative proceeding.

2. Jurisprudential Interpretations

Numerous decisions by the Supreme Court of the Philippines have elaborated on the nature and scope of custodial rights. Some key cases include:

  1. People v. Javar (G.R. No. 74742, January 9, 1992)
    The Supreme Court held that the right to be informed of one’s rights is a continuing one. Law enforcement officers must not only inform the person of their rights at the start of custodial investigation but must continue to ensure that these rights are respected throughout the process.

  2. People v. Mahinay (G.R. No. 122485, February 1, 1999)
    This case emphasized that confessions made without the assistance of competent counsel must be excluded from the evidence. Furthermore, the decision clarified that "assistance of counsel" means effective and genuine legal representation and not merely the pro forma presence of a lawyer.

  3. People v. Andan (G.R. No. 116437, March 3, 1997)
    The Court ruled that while spontaneous statements not in response to questioning are admissible even without the presence of counsel, statements elicited through custodial interrogation without counsel remain inadmissible.

  4. Miranda Doctrine in the Philippines (Miranda v. Arizona in U.S. Jurisprudence)
    The Miranda Doctrine, adopted in the Philippines, requires law enforcement authorities to inform suspects of their rights. Failure to do so invalidates any confession or admission made by the suspect during the custodial investigation.

3. Rights under RA 7438: An Act Defining the Rights of Persons Arrested, Detained, or Under Custodial Investigation

Republic Act No. 7438 (1992) further delineates the rights of individuals under custodial investigation, building on the Constitutional provisions. Key provisions include:

  • Definition of Custodial Investigation
    RA 7438 defines "custodial investigation" as any questioning initiated by law enforcement officers after a person has been taken into custody or otherwise deprived of their freedom of action in any significant way.

  • Rights of Persons Under Custodial Investigation
    This act mandates that any arrested or detained person under custodial investigation must be informed, in a language or dialect known to them, of their rights under the Constitution.

  • Counsel’s Role
    The law affirms the necessity of independent legal representation, specifying that appointed counsel should not be a public prosecutor or government lawyer, as this creates a conflict of interest.

  • Penalties for Violation of Rights
    RA 7438 imposes penalties on law enforcement personnel who violate the rights of a detainee under custodial investigation. This includes imprisonment and fines for those who fail to inform the suspect of their rights or who fail to provide counsel.

4. Waiver of Rights

Under Philippine law, a waiver of custodial rights (e.g., the right to counsel) is only valid if it is made:

  • Voluntarily and without coercion,
  • In writing, and
  • In the presence of counsel.

If these conditions are not met, any confession or admission made during the investigation is inadmissible.

5. Exceptions to the Rule of Exclusion

While confessions made without compliance with the procedural safeguards are generally inadmissible, the Supreme Court has identified certain exceptions:

  • Res Gestae: Spontaneous statements made immediately after a crime are admissible, even if made without the presence of counsel, as long as they are voluntary.
  • Volunteered Statements: A confession that is voluntarily given without any prompting by authorities, and is not a result of custodial questioning, may be admitted as evidence.

6. International Human Rights Standards

The Philippines is a signatory to several international agreements that reinforce the protection of individuals under custodial investigation:

  • International Covenant on Civil and Political Rights (ICCPR): Article 14 ensures the right to a fair trial, which includes the right against self-incrimination and the right to legal assistance.
  • Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment: This treaty obliges the Philippine government to prevent torture or coercion during custodial investigation.

7. Practical Implications

In practice, custodial investigations in the Philippines are closely monitored, particularly in high-profile cases or where allegations of human rights violations exist. Courts meticulously scrutinize confessions obtained during this phase, often excluding those obtained without strict adherence to constitutional guarantees. Law enforcement officers are also regularly trained to comply with legal protocols to avoid the exclusion of critical evidence.


In summary, custodial investigation in the Philippines is a crucial stage where the rights of individuals must be protected to ensure fairness and justice. The 1987 Constitution, RA 7438, and various Supreme Court rulings have established a robust legal framework that guarantees the rights to silence, counsel, and freedom from coercion during this process. These safeguards are in place to prevent abuses and ensure that only voluntary and legally obtained confessions are admissible in court.