Not that any of the attorneys I know would EVER do this, but just to be sure that your document or paper is free of any surreptitiously lifted content, you can always turn to PlagTracker. It’s an online tool that will scan your document, compare the language to its own database of papers as well as website content (like Wikipedia for example), and will return a redlined version pointing out the problems.
Simply enter the content of your paper in the text box. The report back includes information about the portions of the content that need citations and a list of the sources to be cited.
All in all, as long as you keep these concerns in mind, it never hurts to have a free option for checking your content for originality and attribution.