MANILA, Philippines — The National Bureau of Investigation (NBI) has invited Davao City Rep. Paolo ‘Pulong’ Duterte to shed light over the claims lodged by dismissed policeman Rodulfo Gracioso. - LinkedIn. MANILA, Philippines — The National Bureau of Investigation (NBI) has invited Davao City Rep. Paolo ‘Pulong’ Duterte to shed light over the claims lodged by dismissed policeman Rodulfo Gracioso. LinkedIn.