Cotabato City public order and safety officer head retired police colonel Rolen Balquin. (Photo courtesy of Cotabato LGU) COTABATO CITY - The chief of the Police Regional Office of the Bangsamoro Autonomous Region in Muslim Mindanao (BARMM) condemned Monday the killing of this city's public order and safety department head, in an attack over the weekend that also wounded a police officer. In a statement, Brig. Gen. Arthur R. Cabalona also appealed to witnesses to provide authorities with information that will help fast-track the investigation on the murder of retired Colonel Rolen Balquin, the city public order and safety head. "We appeal to whoever may have witnessed the incident to help our investigators identify the suspect for the proper resolution of this case," Cabalona said. Balquin, 60, also a former city police director, was shot by one of two assailants while he was about to alight from his service vehicle on Saturday along Sinsuat Avenue at past 9 a.m. Wounded