They Were Not Surprised
Marty was surprised to hear the reaction from the sons. They did not even seem that shocked to hear about what happened to their father. And while the neighbor might not have known why George was passed out on the floor, his son were both pretty sure that it would have something to do with his heart. Their father had apparently been struggling with his ticker for a while. The police took that at face value at the time, but were these boys actually speaking the truth?