Scanlon, a one-time aide to former House Majority Leader Tom DeLay (R-TX), played a key role in the scandal over Jack Abramoff's lobbying and assisted prosectors with their prosecutions of Abramoff and eight other defendants in the wide ranging corruption case.
"The government greatly credits Scanlon for being the first one to cooperate with the government, and, consequently, considers Scanlon's cooperation as contributing to the success of all of the prosecutions," DOJ prosecutors said.
The government also requested that the court "set a hearing to determine to whom and the proper amounts of restitution to be paid by Mr. Scanlon."
In his 2005 plea deal, Scanlon was required to pay nearly $19.7 million in restitution to Native American tribes.
Scanlon testified in DeLay's state corruption trial last month.
The Justice Department filing was first reported by Politico.