In this idea, I've combined a gavel and magnifying glass into one symbol where the handle of the magnifying glass is dual-purpose as the handle of the gavel. I've mocked it up in a blue/black/white version and a white/green version.
I've used a book and scale to communicate clearly the idea that users will have access to a wide range of legal records (federal and case law).
I'm happy to adjust it if needed. You mentioned that you also need a light green and dark green version. I'll be sending those over shortly as well as a business card mockup in blue. Let me know what you think!