A Matter of Ethics — Robert J. Randisi

In this short story, Nick Delvecchio has an office on Sacket Street, within walking distance of the Brooklyn Bridge. Delvecchio is a one-man shop and can't be too choosy about his cases, which is why, in “A Matter of Ethics,” he agrees to tail a man to make sure he's adhering to his diet. It only gets complicated when Nick learns the man is unfaithful to his wife.