FBI scientist Olivia St. Martin is guilt-stricken when new DNA tests exonerate the man she testified against some thirty-odd years ago as being responsible for her sister's abduction, consequent rape, and death. Her horror at having had a hand in incarcerating an innocent man for a major part of his life is eclipsed by the realization that the original killer escaped scot-free. Obsessed with finding the truth, she digs up old case files going back thirty years. After a great deal of research and effort, she discovers that her sister’s killer has gone on doing his sick deeds all these years without leaving a single clue or trail behind him.
Upon finding the two most recent killings have occurred in Seattle and that there is a chance the killer is still in the area, she notifies her superiors, who unfortunately refuse to believe her. Pretending to be a field agent, she flies to Seattle herself and teams with a local policeman to capture the madman. Together they work against time as another girl is kidnapped and only they can save her. During this time, Olivia and Zack Travis grow increasingly closer, but Olivia’s refusal to reveal her obsession with capturing this killer keeps Zack wary. Busy with her crusade, Olivia doesn't suspect that the man she helped wrongfully convict is out for her blood as well.
Allison Brennan brings her trilogy to an outstanding finish with The Kill. Grittier and more suspenseful than the previous two novels, this book also has the most villainous villain as well – a killer who rapes and murders young girls. Brennan as usual has a field day mining deep into twisted and scarred psyches to reveal not only why Olivia is her aloof self but also why the rapist is the way he is. As the story progress so does the violence, and the tension is nail-biting.
Olivia and Zack’s romance springs up too suddenly for believability, but although distracting, it doesn’t deviate interest from the overall story. What makes this book more profound than the others is Brennan’s penetrating look at what violence does, not only to its victims but to those who left behind as well, how tragic events can make or break a family unit, and the supreme willpower needed to avoid this sad state of affairs. Powerful, emotional, and not for the faint-hearted, Allison Brennan books are to watch out for.