Second arrest made in Stone Mountain armed robbery, murder 3 days before Christmas By FOX 5 Atlanta Digital Team Published (DeKalb County Sheriff's Office) DEKALB COUNTY, Ga. - Deputies have made a second arrest in connection to the robbery and murder of a Stone Mountain man just days before Christmas. Roy Jackson, 20, was taken into custody on Tuesday and charged with armed robbery and felony murder. Siah Gray, 20, was found shot to death at his Wake Forest Road home on Dec. 22. According to his arrest warrants, Jackson directed 17 -year-old Chevaz Mekhi Barnes, of Decatur, to shoot Gray. The warrants further state Jackson then took money and drugs from the victim’s pockets.