The Poet by Michael Connelly

Denver crime-beat reporter Jack McEvoy specializes in violent death. So when his homicide detective brother kills himself, McEvoy copes in the only way he knows how--he decides to write the story. But his research leads him to suspect a serial killer is at work--a devious murderer who's killing cops and leaving a trail of poetic clues. It's the news story of a lifetime, if he can get the story without losing his life.