You Choose - Falcone & Richards Thrillers, #1

After a police officer's family is taken hostage, he faces a deadly choice: one of his family members will live, and the other will die. He must make the decision, and time is running out. Homicide Investigators Vincent Falcone and Farrah Richards take the case, and a team is assembled. Every effort is made to catch the psychopath before the next murder. The killer makes mistakes; it's almost as if getting caught doesn't matter.
But can they reach him in time?