11.   Duncan and former Enron treasurer Ben Glisan Jr. have reportedly been granted limited immunity from prosecution in exchange for help in the investigation.

12.   Even though Thompson was blocked in his attempt to grant limited immunity for low-level witnesses two weeks ago, however, he said the hearings will go on.

13.   For Starr, the options are whether to force her to testify before the grand jury under limited immunity, or indict the former intern.

14.   Granting even limited immunity to witnesses in exchange for testimony can complicate any subsequent criminal prosecutions, so Congressional investigators weigh the decision carefully.

15.   He has since met with federal investigators under a limited immunity arrangement that protects him from self-incrimination on specific matters he discusses with investigators.

16.   If Lewis refused to testify after being given limited immunity, she could be cited by a judge for contempt and jailed.

17.   If she testified with limited immunity, whatever she says could not be used against her.

18.   In exchange for limited immunity, the tobacco industry will agree to some governmental regulation and give up a broad range of current marketing and advertising practices.

19.   In practice, people who are granted limited immunity are not usually prosecuted for related offenses.

20.   Instead, she may be forced to testify with limited immunity or face jail, legal experts said Tuesday.