Key facts
- John Elijah Matthews is accused of fatally stabbing Margaret Swan on MARTA.
- Margaret Swan was described as an innocent woman trying to reach her destination.
- Matthews is now facing a federal charge.
- The suspect could potentially face the death penalty.
John Elijah Matthews, who is accused of the fatal stabbing of Margaret Swan on MARTA, is now facing a federal charge. Swan, a great-grandmother, was described as an innocent woman who was simply trying to reach her destination when the attack occurred. Matthews could potentially face the death penalty.