But it offers few hints about a central question: What was the alleged wrongdoing?
The concise federal grand jury indictment handed down yesterday accuses Hastert of agreeing to pay the money to a person identified in the document only as "Individual A," to "compensate for and conceal his prior misconduct against" that person.
It notes that Hastert was a high school teacher and coach from 1965 to 1981 in suburban Yorkville, west of Chicago. It goes on to say Individual A has been a resident of Yorkville and has known Hastert for most of Individual A's life, but it does not describe their relationship.
"Notice the teacher and coach language," said Jeff Cramer, a former federal prosecutor and head of the Chicago office of the investigation firm Kroll. "Feds don't put in language like that unless it's relevant."
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No one has contacted the school district where Hastert worked to report any misconduct involving him, school officials today said in a statement. The district did not learn of the indictment until it was made public yesterday.
As speaker, Hastert pushed President George W Bush's legislative agenda, helping pass a massive tax cut and expanding federal prescription drug benefits. During those years, he was second in the line for the presidency, after the vice president.