The retracing of the situation from different perspectives leads to a continual deepening in the reader’s understanding of what has happened, a deepening that can bring a sense of resolution but one that allows for the complexity of the situation and that leaves the moment of shock unchanged and still central.
I believe that this really highlights what choices are all about when you look at them from an outside perspective. Having the ability to understand different perspectives on why things happen and how choices can impact a situation makes people more understanding in social and life situations.