December 29, 2016 11:48 am Person of Interest in South Philly Store Owner's Murder Philadelphia Police questioned a man in the killing of 81-year-old Marie Buck inside Marie’s Grocery in South Philadelphia on Christmas Eve. Buck owned and operated the store for decades. US & World Videos 2:26 Pro-Palestinian protest and encampment continues at Drexel University 2:44 Mayor Parker announces city workers will return to office full-time in the summer 25:15 WATCH: Mayor Cherelle Parker announces all city workers will return to office full-time this summer 1:55 Penn students graduate amid extra security after an academic year full of unrest 11:16 Another campus protest in Philly: The Lineup