In the federal court papers, he's known only as "Lobbyist C."

But prosecutors description of the man who funneled illegal favors to John Albaugh, the former chief of staff for U.S. Rep Ernest Istook (R-OK), sounds pretty familiar.

After checking our records, we'd say that lobbyist is most likely Kevin Ring, the former Abramoff underling who took the Fifth Amendment before the Senate Indian Affairs Committee in 2005 rather than answer a series of questions from lawmakers. (The AP agrees.)

Ring worked for Rep. John Doolittle (R-CA) from 1993 to 1998 and later worked for the Senate Judiciary Committee, then the Conservative Action Team (co-founded by Doolittle), before he joined Jack Abramoff at Greenberg, Traurig LLP in 2001.

Ring quit is lobbying post the same day the FBI raided Doolittle's home in April 2007.