Dead Right — David Shaffer

Based on a true unsolved crime, Harry Caine, a licensed Florida PI, was working cases in West Palm Beach when a satisfied client recommended him for an assignment he couldn't turn down, up north in the deep south of North Carolina's Piedmont Triad area.
Harry and his assistant, Mona Morgan, take on an unsolved, nine- year-old murder that has never been declared cold. The investigation leads Harry to a wife beater, a homosexual sociopath, and secret software operations of a major credit card company.
Harry and Mona demonstrate their skills as professional investigators in this intriguing mystery motived by love, greed and the desire to kill.