Police said the incident occurred last Wednesday at the Uplift Community High School pool. Police said the teen followed the girl into a locker room and sexually abused her, causing minor injuries. The victim was taken to Illinois Masonic Hospital for treatment.
The boy has been charged as a juvenile with criminal sexual abuse.
The Chicago Park District released a statement, saying, "The Chicago Park District staffs the pool at Uplift High School during the summer. The pool staff received a report of assault and immediately notified the Chicago Police Department."