The younger brother of alleged D.C. tax scam mastermind Harriette Walters is expected to plead guilty to his role in the city’s largest ever public corruption scandal, The Examiner has learned.

Richard Walters, 49, is scheduled to appear in federal court in Greenbelt today. According to court records obtained by The Examiner and sources close to the ongoing investigation, the junior Walters will admit that he helped his sister cash and distribute phony property tax refunds at least as early as 2001.