The Cruelest Cut by Gene Rontal

After the brutal death and mutilation of a young Arab man, Ben Daily, M.D., becomes embroiled in the Detroit Police Department's attempts to track down a vicious serial killer who preys on teenagers. Following a convoluted trail that takes him to private medical clinics, the homes of grieving parents, and the offices of respectable... and not so respectable... physicians, Daily narrows down a wide field of suspects. When he decides to confront one of them on his own, he never expects that his skill...