Prosecutors are continuing to build their case against Rep. William Jefferson (D-LA).
A grand jury has subpoena'd documents from his daughter's old law firm, according
to the New Orleans Times-Picayune
Jefferson is under investigation for cutting dirty deals involving new telecommunications businesses in Africa, and trying to get his family members in on the action.
Prosecutors have known of the law firm's involvement in Jefferson's deals -- it even drew up papers for one of them, and the work was probably done by Jefferson's daughter, Jamila.
Prosecutors have known all that for some time. So this request for paper is either to nail down a detail of their case -- or put the screws to Jefferson's daughter, in an effort to get him to talk.