A Pontiac Correctional Center inmate is accused of trying to escape from the maximum-security lockup last year. An attempted escape charge has been filed against 23-year-old John Anderson Junior who is currently serving a prison term for predatory criminal sexual assault in Cook County. Authorities say Anderson displayed a dummy, using a jumpsuit and mattress padding, on his cell bed while he hid under the bed, intending to escape. If convicted, Anderson could face an additional ten years in prison because of his prior conviction.