The attack left her severely disabled.
Now at age 22, Girl X will be too old to live at the Illinois Center for Rehabilitation and Education.
Current Cook County state's attorney, Anita Alvarez, helped prosecute the man who attacked Girl X and has since maintained a close relationship with her.
"She's very excited about being on her own as well as she could but she obviously is going to have a lot of needs," said Anita Alvarez, Cook County state's attorney.
A board has been formed to help find Girl X a new permanent home.