Investigators identified the security guards involved in a fatal shooting Wednesday night at a Northrop Grumman facility in Anne Arundel County. Police said the shooting stemmed from a dispute between Aman and another guard, Dylan Blake Chandler, 26, of Pasadena. According to police, the two contracted security guards got into a dispute inside the facility, leading Chandler to shoot Aman. The isolated incident did not involve Northrop Grumman employees, police said. In a statement sent Wednesday night to WBAL-TV 11 News, Northrop Grumman said: “We are aware of an isolated incident involving two contractors at one of our Baltimore area facilities.