I don't think sealing has anything to do with answer to the question have you ever been arrested. The fact remains you were arrested and I think you run a serious risk of ethical problems if you lie to the Fitness and Character Committee. If you really want to check this out, I suggest you consult with a lawyer who specializes in defending lawyers before the grievance committee. I can give you a name if you contact me. The above is for informational purposes only and not meant as legal advice.