Demarco Mathis, 45, was fatally shot at the Arts Center MARTA station in Atlanta on August 11, 2024. The shooting happened around 9 p.m. in the station’s bus loop; a security officer found Mathis with multiple gunshot wounds and he later died at Grady Memorial Hospital.

Surveillance footage showed Mathis sitting and talking with another man on a bench for about half an hour before that man stood, produced a firearm, and shot Mathis multiple times. Authorities identified the other man as coworker Xavier Mosley, 38, using facial recognition and the footage. A search warrant at Mosley’s Atlanta home three days later led officers to take him into custody; a handgun recovered there was ballistically matched to the shooting.

Charges have been filed against Mosley, including murder, aggravated assault with a deadly weapon, and possession of a firearm by a convicted felon. Was anyone at the Arts Center MARTA station that evening who saw Mathis or the man he was with?