When legendary Washington Postreporter Mary Keegan is found murdered, homicide detectives Frank Kearney and Jos? Phelps pull up the file on another open case. There as here, the victim was a female who had been hacked to death in a public park. And there is one other link: each was missing a little finger, a grisly souvenir-perhaps the calling card of a serial killer. When, a week later, a third woman is found in similar circumstances, they're sure...