Frenzy by Rex Miller

If killing could be a profession, Frank Spain would be a master. He knows how to deal out death better than any specialist in the business, but when his daughter Tiff becomes a sex object in a nasty porno flick game, Frank is out to seek revenge like never before. Homicide Detective Jack Eichord has never been dealt such a grisly case, but as he traces evidence cross-country in pursuit of the killer, he learns how pleasurable murder has become for Frank Spain and how horrid it's becoming for his victims.