Expungement of an OUI conviction is extraordinarily rare in Massachusetts. The Commonwealth allows expungement only for convictions before age 21 under narrow conditions, or when the arrest resulted in a not-guilty verdict, dismissal, or nolle prosequi. A CWOF under 24D can potentially be sealed after the probationary period ends, which makes it invisible on most background checks. True convictions can be sealed after 10 years for misdemeanors and 15 years for felonies, but sealed does not mean destroyed - law enforcement and courts can still access the record, and the RMV treats your driving history as permanent. The best strategy is preventing conviction in the first place. Bank & Munns has resolved numerous OUI cases through suppression motions, not guilty verdicts, and strategic dismissals.