We’ve seen that he was “spending the summer” at grandma’s. Smells just like St. Skittles being sent to spend the holiday with dad to get him outta town after his brush with the law. Did he always live with grandma since she lives 15 mins. from his HS or what? Why wasn’t he at home? Or maybe grandma let him get by with more crap. She had just driven by him so why didn’t she tell him to get out of the middle of the road? I would have but then the kids I raised don’t rob stores, knock people around, flash gang signs and attack cops.
Maybe he lived with Grandma because his driver's license was suspended and he had to walk to school.