Throught those twenty years bob went through situations that the rest of the world would percive Bob as a criminal. Since Bob was a criminal he thought of the officer to be as the other officers and not even possibly think that Jimmy would also enroll to become a police officer.
Jimmy knew that the man waiting was Bob but he also knew that Bob didnt't recognize Jimmy when he stated "It's all right, officer," he said, reassuringly. "I'm just waiting for a friend. It's an appointment made twenty years ago." At this point Jimmy knew