Quezon City Police District (QCPD) Director Police Chief Supt. Richard Alabano on Tuesday ordered the creation of a Special Investigation Task Group (SITG), to conduct thorough investigation of the killing of Police Chief Insp. Roderick Medrano, who was ambushed and killed early Monday on Zabarte Road, Brgy. Kaligayahan, Novaliches, Quezon City. Albano said the SITG Medrano to be headed by Sr. Supt. Procopio Lipana, will also launch a manhunt for the suspects.