Man accused in deadly MARTA train stabbing now facing federal charges

The man accused of fatally stabbing a woman aboard a MARTA train in southwest Atlanta is now facing federal charges, according to the U.S. Department of Justice.Federal prosecutors announced Tuesday that 25-year-old John Elijah Matthews, of Decatur, has been charged with committing an act of violence causing death on a mass transportation system following the deadly stabbing of 66-year-old Margaret Swan.According to the DOJ, Swan was riding a northbound MARTA train from the Lakewood station to O