The circumstances of the shooting were not immediately clear.
Antiq Hennis was shot in the head while sitting in his stroller at the intersection of Bristol Street and Livonia Avenue on Sunday, Sept. 1, cops said.
The gunman in that shooting, Daquan Breland, was aiming for the boy's father, seeking revenge for yet another nearby shooting from last year.
Breland, who was arrested seven days ago, was indicted on murder and weapons charges, prosecutors announced Thursday. He faces up to 15 years in prison if convicted.
His accomplice was indicted on weapons charges and faces 15 years behind bars, prosecutors said.