William Jefferson (D-LA) was indicted Monday on federal charges of racketeering, soliciting bribes and money-laundering after a long-running investigation into business deals he tried to broker in Africa.
Jefferson, 63, is accused of soliciting bribes for himself and his family, and also for bribing a Nigerian official.
In August 2005, investigators raided Jefferson's home in Louisiana and found $90,000 in cash stuffed into a box in his freezer.
Jefferson has maintained he is not guilty. He was re-elected last year, despite the investigation.
He could not immediately be reached for comment on Monday.