Chilling True Story: The October List by Jeffery Deaver

Gabrielle is sitting in an apartment in Manhattan, watching the clock. Her daughter has been kidnapped, she's shot and killed a man, and is trying to negotiate with the kidnapper. He wants the October List, and he wants money. The doorbell rings... That is the end of Gabrielle's story, and the first chapter of the novel. The next chapter is the scene which came before, and what follows is what happened before that.