Anthony was arrested around 5:30 p.m. Friday, and has been charged with aggravated assault.
Police said the 16-year-old brother had received threats prior to the attack.
Bauer, the accused shooter, was arrested Thursday and charged with aggravated assault. He is being held at the DeKalb County jail with a $100,000 cash-only bond, authorities said. Bauer's parents said he was home asleep when the shooting happened.