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Filipino protesters gather in front of the Senate building in Pasay, Metro Manila, on May 18 (local time) to demand the commencement of impeachment proceedings against Vice President Sara Duterte and the arrest of Senator Ronald "Bato" dela Rosa, known as former President Duterte's "enforcer." / AFP-Yonhap News Agency

The Philippine Supreme Court on May 20 (local time) dismissed a petition filed by Senator Ronald dela Rosa seeking to suspend the enforcement of an International Criminal Court (ICC) arrest warrant against him. The decision effectively clears a legal hurdle for authorities to secure custody of the former national police chief who spearheaded former President Rodrigo Duterte's deadly "war on drugs."

According to local media outlets and Reuters on May 21, the Supreme Court voted 9-5, with one abstention, to deny both the Temporary Restraining Order (TRO) and the status quo ante order requested by dela Rosa.

"This decision is solely a determination on the temporary relief, and the remaining issues raised by the senator will be ruled upon later by the 15-member en banc court," the Supreme Court stated in an official announcement. While the pending issues include whether a sitting senator can be arrested without a warrant issued by a domestic Philippine court, legal observers generally view them as secondary technical considerations.

The development follows the ICC's unsealing of an arrest warrant for dela Rosa last week, which named him a "co-perpetrator" alongside former President Duterte on charges of murder constituting crimes against humanity. Duterte himself was apprehended last year and is currently awaiting trial in The Hague, Netherlands. Dela Rosa served as the chief of the Philippine National Police from 2016 to 2018, orchestrating the initial phases of the Duterte administration's narcotics crackdown, before transitioning to politics and winning a seat in the Senate in 2019.

An initial attempt by government agents to execute the warrant at the Senate building last week was thwarted. Pro-Duterte Senate leadership shielded dela Rosa inside the complex, triggering a brief armed standoff and an exchange of gunfire between government operatives and Senate security personnel, which sent other lawmakers scrambling for cover in their offices. Dela Rosa slipped out of the Senate building shortly after the incident and his current whereabouts remain unknown.

With the Supreme Court's ruling, the administration of President Ferdinand Marcos Jr. has secured the legal justification needed to resume enforcement of the warrant.

"As it stands, we can say that the arrest warrant remains valid against the senator," presidential spokesperson Claire Castro told reporters. However, regarding the immediate resumption of the arrest operations, Castro added that the administration "will defer to Justice Secretary Frederic Vida to interpret and assess the Supreme Court's decision." Secretary Vida had previously ordered law enforcement personnel to temporarily pause enforcement efforts last week pending clarification from the high court.

The primary operational challenge now hinges on locating the fugitive lawmaker. Manila authorities have yet to confirm whether they will immediately launch a manhunt or await further judicial clarifications before taking next steps.