BOSTON — The longtime girlfriend and fugitive companion of James “Whitey” Bulger is expected in federal court to face a contempt charge for refusing to tell whether other people helped the Boston mobster during his 16 years on the run.

Catherine Greig is scheduled to make an initial appearance on the new charge Monday in U.S. District Court.

Greig, 64, already is serving an eight-year sentence for conspiracy to harbor a fugitive, identity fraud and conspiracy to commit identity fraud.