Only Child (Paperback) by Andrew Vachss

It’s been years since Burke has been home, years since he’s seen his “family” and worked in the underbelly of New York City. Although his appearance has changed, his reputation grown dusty and his wallet thin, his skills and his crew remain razor sharp. So when he is contacted by a mob boss to investigate the murder of his illegitimate daughter, Vonni, Burke takes the job and begins searching for an unspeakably brutal killer.

Posing as a casting director looking for tomorrow’s stars, Burke reaches out to the high school students who knew Vonni, and may know the identity of the killer. Before long he unearths a perverse enterprise—a young director pursuing a brutal new type of cinema verité.