Given the importance of what they do, and the controversies that often surround them, and the violent people they sometimes confront, it is remarkable that in the history of this country only four active federal judges have been murdered. Judge Raymond Fawcett has just become number five. Who is the Racketeer? And what does he have to do with the judge's untimely demise? His name, for the moment, is Malcolm Bannister. Job status? Former attorney. Current residence? The Federal Prison Camp near F