I. Introduction

This memorandum provides an exhaustive analysis of the rule on warrantless arrest for terrorism-related offenses under Philippine special laws. The primary focus is on the Human Security Act of 2007 (Republic Act No. 9372) and its repeal and replacement by the Anti-Terrorism Act of 2020 (Republic Act No. 11479). The analysis will cover the statutory basis, constitutional context, procedural requirements, and judicial interpretation of warrantless arrest powers granted to law enforcement agents in the context of terrorism. The objective is to delineate the legal boundaries and operational parameters of this extraordinary police power.

II. Constitutional Framework: The Rule on Arrests

The 1987 Constitution enshrines the right against unreasonable searches and seizures. Article III, Section 2 mandates that a warrant of arrest must be issued by a judge upon a finding of probable cause. This is the general rule. However, the Rules of Court, specifically Rule 113, Section 5, outlines the recognized exceptions permitting a warrantless arrest: (a) when, in the presence of the arresting officer, the person to be arrested has committed, is actually committing, or is attempting to commit an offense (in flagrante delicto); (b) when an offense has just been committed, and the arresting officer has probable cause to believe based on personal knowledge of facts or circumstances that the person to be arrested committed it (hot pursuit); and (c) when the person to be arrested is a prisoner who has escaped or an escapee. Any special law provision on warrantless arrest must be construed within, and cannot contravene, this constitutional framework.

III. The Human Security Act of 2007 (R.A. 9372)

Section 19 of the Human Security Act of 2007 provided a specific rule for the warrantless arrest of a terrorism suspect. It authorized any law enforcement agent or military personnel to arrest a person suspected of the crime of terrorism without a judicial warrant under the following conditions: (1) the arrest must be based on probable cause; (2) the terrorism offense must have been committed, or is being committed, or is about to be committed; and (3) the arrest must be made upon the authority of a written order from the Anti-Terrorism Council (ATC). The provision required that the person arrested be delivered to the proper judicial authority within three (3) days. This provision was subject to significant criticism for potentially expanding the exceptions under Rule 113, particularly by introducing the concept of arrest for a crime “about to be committed” and by substituting the ATC’s written order for a judicial warrant.

IV. The Anti-Terrorism Act of 2020 (R.A. 11479)

The Anti-Terrorism Act of 2020 repealed the Human Security Act of 2007. Its provisions on warrantless arrest are found in Section 29. This section significantly amended the prior regime. It states that any law enforcement agent or military personnel may, without a judicial warrant, arrest a person suspected of committing any of the acts penalized under Sections 4 to 12 of the Act. The conditions are: (1) the arrest must be based on probable cause as determined by the arresting officer; and (2) the arrest must be made upon the authority of the ATC. The written order of the ATC is required provided that the arrest is made within a period of sixty (60) days from the issuance of the ATC’s written authorization. The law mandates that the person arrested shall be delivered to the proper judicial authority within thirty-six (36) hours for crimes punishable under Reclusion Temporal to Reclusion Perpetua, or within twenty-four (24) hours for other crimes, in accordance with Article 125 of the Revised Penal Code.

V. Judicial Interpretation and the Lagman et al. v. Executive Secretary et al. Case

The constitutionality of Section 29 of the Anti-Terrorism Act of 2020 was challenged. In the landmark case of Lagman et al. v. Executive Secretary et al. (G.R. Nos. 252741, 252562, etc., December 9, 2021), the Supreme Court declared a portion of Section 29 void for being unconstitutional. The Court held that the phrase “upon the authority of the Anti-Terrorism Council” was invalid. The Supreme Court ruled that the ATC, being an executive body, cannot issue arrest orders. The power to determine probable cause for the issuance of an arrest warrant is exclusively a judicial function. Consequently, after this decision, a warrantless arrest for terrorism-related offenses under R.A. 11479 can only be validly effected under the general exceptions provided in Rule 113, Section 5 of the Rules of Court. The ATC’s written authorization can no longer serve as a legal basis for an arrest without a warrant.

VI. Operational Parameters Post-Lagman Decision

Following the Lagman ruling, the legal basis for a warrantless arrest in terrorism cases is strictly limited to the circumstances enumerated in Rule 113, Section 5. Law enforcement must establish either: (1) in flagrante delicto arrest—the suspect was caught in the act of committing, attempting to commit, or has just committed a terrorism-related offense in the presence of the arresting officer; or (2) hot pursuit arrest—a terrorism-related offense has in fact just been committed, and the arresting officer has personal knowledge of facts indicating that the suspect is the perpetrator. The concept of arresting a person “about to commit” an offense, absent overt acts constituting an attempt, does not fall under in flagrante delicto. The arresting officer’s determination of probable cause must be based on personal knowledge, not on mere suspicion or intelligence relayed by another.

VII. Comparative Analysis: HSA 2007 vs. ATA 2020 (Post-Lagman Ruling)

The following table compares the key aspects of the warrantless arrest provisions before and after the Lagman decision.

VIII. Legal Safeguards and Remedies Against Illegal Warrantless Arrest

A person subjected to an illegal warrantless arrest retains all constitutional remedies. The exclusionary rule under the Constitution renders any evidence obtained from an unlawful arrest inadmissible in court (fruit of the poisonous tree doctrine). The person arrested may file a motion to quash the information on the ground of lack of jurisdiction over their person due to an invalid arrest. They may also file a petition for the writ of habeas corpus to challenge the legality of their detention. Furthermore, criminal and administrative charges may be pursued against the arresting officers for arbitrary detention or violations of the Anti-Torture Act (R.A. 9745) if applicable.

IX. Practical Implications for Law Enforcement

For law enforcement agents, the Lagman decision necessitates a return to fundamental criminal procedure. Operations must be designed to fall squarely within in flagrante delicto or hot pursuit scenarios. Reliance on the ATC for arrest authority is legally untenable. Continuous training on the elements of terrorism-related offenses and the strict requirements of probable cause based on personal observation is essential. To secure a lawful arrest and ensure the admissibility of evidence, the preferred course remains to apply for a warrant of arrest from a judge based on a finding of probable cause established through thorough investigation and the submission of a sworn complaint or information.

X. Conclusion

The rule on warrantless arrest for terrorism-related offenses has evolved significantly. The expansive provision under the Human Security Act of 2007, which relied on executive authorization, was replaced by the Anti-Terrorism Act of 2020, whose similar mechanism was subsequently invalidated by the Supreme Court in Lagman. Presently, the arrest of individuals suspected of terrorism without a warrant is strictly governed by the general rules of criminal procedure under Rule 113, Section 5. No special, expanded power exists. Law enforcement must adhere to the constitutional standards of in flagrante delicto or hot pursuit arrests, where probable cause is derived from the arresting officer’s personal knowledge. All other arrests require a judicial warrant. This state of the law reaffirms the primacy of judicial authority in the issuance of arrest warrants, a core constitutional safeguard against arbitrary detention.