KIDAPAWAN CITY, Cotabato—A man believed to be under the influence of illegal drugs killed his mother following a heated argument inside their home in the town of Kabacan, Cotabato province, early on Monday, police said. Police Col. Ramel Hojilla, Cotabato police director, identified the victim as Floresma Mesmis Mamari, 59, a widower, of Purok Mabuhay,
