Former AIG executives Robert Willumstad, Martin Sullivan and Maurice Greenberg are scheduled to testify.

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Last month, Robert Willumstad, Citigroup's number two, also said he was going in the autumn.

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Weill as chief executive in October 2003, a slight surprise at the time since his rival for Weill's attention was Robert Willumstad, head of Citi's global consumer group.

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Other executives who had been considered contenders include Robert Willumstad, the chairman of American International Group (nyse: AIG - news - people ), who left Citigroup in 2005 after being passed over for the top job.

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