Graduating from college without knowing how to read would be basically impossible. You wouldn't be able to read test questions. That alone would result in you failing every class.
I could see how he would pass high school, as sad as that is. He may have been cheating and handing on other peoples' homework in college, but how does one pass the upper division courses where the final is 60% of your grade? You can't pass a final that you can't read. He claims he passed the blue book out the window and his friend would write down the answers, but who seriously believes that that would work?