The incident happened around 9:15 p.m. on Towne Park Drive near the school, where two groups of teenagers got into a fight over a cellphone, McDonough police spokesman Maj. Kyle Helgerson said. One of the teens pulled out a pocket knife and fatally stabbed a 13-year-old, he said. The 15-year-old is in custody, Helgerson said.
Charges are pending for another suspect, a 17-year-old, and a 14-year-old involved in the incident has been charged with affray and was released to the parents, Helgerson said. The names of those involved were not released.