No MIddle Ground (DS Peter Gayle crime thrillers, Book 5‪)‬

A missing father. A desperate daughter. A terrible discovery.
A new case is the last thing DS Pete Gayle needs right now, but when it falls right into his lap, he has no choice. Justice is crying out to be served. With a career-making trial about to begin and his son in imminent danger from a pair of psychopathic brothers, Pete goes on the hunt in what could turn out to be the biggest case of his life.