By Salam Bustanji A security guard was killed and another was injured in a stabbing incident at the Macy’s department store in Center City Philadelphia on Monday morning. The suspect, who was allegedly trying to shoplift hats, was arrested after fleeing on public transportation (SEPTA). BREAKING: Mass stabbing at Center City Macy's in Philadelphia. 1 security officer was pronounced dead. 2 others have been rushed to the hospital. Developing story ...