(CNN) -- — A Georgia judge Thursday sentenced a teenager to life in prison without parole plus 105 years in the March shooting death of a 13-month-old boy.
De'Marquise Elkins was convicted in August of multiple charges, including felony murder, in the shooting death of 13-month-old Antonio Santiago during a robbery.
Elkins was spared the death penalty because he was only 17 when the baby was shot.
Elkins also was convicted of aggravated assault and other charges for shooting a pastor during an earlier mugging. His mother, Karimah Elkins, has been convicted of tampering with evidence for her role in trying to cover up the child's shooting in Brunswick, about 75 miles south of Savannah.