Chronicles I ch.10 - The Death of King Saul

The narrative segment of Divrei Hayamim opens with Shaul's tragic death. This is the only story of Saul's life. why does Div Hayamim choose to begin at this exact point? Since the author of Div. Hayamim is a very discerning historian, highly attentive to his task, the choice of a beginning must be deliberate and meaningful. What is he trying to communicate?