The answer to your first question is the DUI will remain on your criminal record for the rest of your life. You may want to discuss the expungement process with an attorney in your area, it will allow you deny the conviction to private employers, however, it will not lift the obligation to report the conviction to government agencies for licensing requests and there are other exceptions as well. You should discuss the utility of an expungement with a lawyer.
Answered on May 09th, 2013 at 1:32 PM