Those Who Walk Away
Patricia Highsmith
 When Ray Garrett's new wife kills herself on their honeymoon, he persuades the initially suspicious Rome police that he's innocent of any wrongdoing over the death. However, his father-in-law, the brutish Ed Coleman, is convinced Ray killed her and shoots Ray, leaving him for dead. He survives and, desperate to prove himself, follows Coleman to Venice, where a deadly game of cat-and-mouse ensues, with Coleman still seeking justice and Garrett a clear conscience.