Now, her ex-boyfriend and his girlfriend are being held responsible.
Nineteen year old Araceli Rios and 18 year old Michael Anderson are facing charges of aggravated battery and mob action after reportedly ganging up on the teen Wednesday night.
The fight broke out just after 7:30 at O'Neil Park.
Rios reportedly attacked the girl, beating her in the face and smashing her head into the pavement.
Police say two witnesses tried to intervene, but Anderson stopped them.
A cell phone video of the incident was captured on a bystander's phone.
Police are using that to further their investigation.