Their neighbor
On that day, Charles had seen a police car parked outside of their house and he was panicking. He knew that something was wrong and that what he did could come back to him in the worst way. Charles had really not done a lot of self-reflection during his life.
When he was younger, he had a family, but most of them left him or didn’t want to spend time with him because of his bad attitude. He never stopped and asked why this was, he just kept digging his hole deeper and deeper. All those years of being cranky were about to catch up to him.