articleThe Brief A 37-year-old man was shot and killed following a violent road rage dispute on Highway 78 westbound on Saturday afternoon. A 54-year-old man is in custody after a deadly shooting on Stone Mountain Freeway (Hwy 78) on Saturday afternoon, according to DeKalb County Police Department. What we know:The shooting took place on Stone Mountain Freeway (Hwy 78) westbound, just before Stone Mountain Park, near the DeKalb and Gwinnett County line, around 3:20 p.m. Authorities said the shooting stemmed from a road rage incident. What we don't know:Exactly what triggered the road rage incident remains unclear as detectives continue to investigate.