Jamarcus Napper, 20, accepted a plea deal Wednesday. He's one of 20 adults and juveniles charged in the continuous sexual assault of the little girl.
Napper was sentenced to 15 years in prison. His plea deal comes less than a week after one of his co-defendants, Jared Cruse, was convicted and sentenced to life. The only other defendant to go to trial, Eric McGowen, was sentenced to 99 years in August.
Napper is now the 13th suspect to plead guilty.
Prosecutors expect a 21st suspect could be charged in the coming weeks.