The Senate of the Philippines should explain how Senator Ronald “Bato” dela Rosa managed to leave while under its protective custody, National Bureau of Investigation (NBI) Director Atty. Melvin Matibag said.

Senator Ronald "Bato" Dela Rosa, a former national police chief, has sought refuge in the senate.

Lawyers for Sen. Ronald "Bato" dela Rosa on Thursday declined to confirm or deny whether the senator is still in the heavily-guarded Senate compound amid reports he snuck away…