The Gypsy Twist (Paperback, 3rd ed.)

Max looked carefully at the dead boy, reminding himself that most murder victims looked very young and surprised when their bodies were found, as if life had suddenly rushed up and taken them unawares. - Shattered after a gang attack in Central Park, misfit NYPD Officer Max Royster accepts a free-lance assignment to track down a serial killer preying upon wealthy private school students. In the course of his cross-country investigation, Max discovers that not all predators are born alike.