The former chief financial officer of Freddie Mac ( FRE), who resigned last week amid an accounting scandal at the nation's second-biggest mortgage buyer, is also leaving E*Trade's ( ET) board. The online broker and bank announced Vaughn Clarke's resignation in a press release Thursday. E*Trade didn't give a reason for the move. Clarke had only been a member of the company's board for three months. Clarke was one of three top Freddie executives who were ousted at the mortgage finance firm. The management shakeup occurred as questions swirled about Freddie's accounting treatment for its massive derivatives portfolio and the firm's announcement that it will restate earnings for the past three years. The Securities and Exchange Commission and federal prosecutors are investigating its accounting practices. Capitol Hill also is planning to investigate, with the House Commerce, Trade and Consumer Protection subcommittee planning to hold a hearing next week on the Freddie mess. With Clarke's resignation from the E*Trade board, that means David Glenn, Freddie's former president, is the only ousted executive to remain on the board of another public company. Glenn, who was fired from Freddie, is a member of the board of the investment management firm Neuberger Berman ( NEU). Earlier this week, a Neuberger spokesman declined to comment on Glenn's status. Glenn was fired at Freddie for failing to cooperate with an internal investigation and allegedly altering pages and notations in several personal diaries he kept about the mortgage firm's business activities. The internal investigation began after the McLean, Va., company announced in January it would have to restate earnings for the past three years.