THE PRACTICE OF GRANTING IMMUNITY FROM PROSECUTION TO WITNESSES BEGAN IN EARLY 18TH CENTURY ENGLAND, WAS CARRIED TO THE AMERICAN COLONIES, AND TODAY THE FEDERAL GOVERNMENT, ALL OF THE STATES, THE DISTRICT OF COLUMBIA, AND PUERTO RICO HAVE LAWS AUTHORIZING WITNESS IMMUNITY. THE SECTION ON FEDERAL LEGISLATION COVERS INDICTMENT OF A WITNESS UNDER IMMUNITY, USE OF IMMUNIZED TESTIMONY IN ADMINISTRATIVE PROCEEDINGS, LAWS COVERING THREAT OF FOREIGN PROSECUTION, SECTION 6002 PERJURY EXCEPTIONS, AND IMPEACHMENT BY IMMUNIZED TESTIMONY. THE SECTION ON STATE LAWS DISCUSSES GENERAL IMMUNITY STATUTES, TRANSACTION STATUTES, USE STATUTES, AND SPECIALIZED STATUTES. THE PROCEDURES A STATE ATTORNEY GENERAL MUST FOLLOW TO GRANT WITNESS IMMUNITY ARE SUMMARIZED AND POLICY CONSIDERATIONS ARE EXAMINED. USE OF IMMUNITY GRANTS FOR DEFENSE WITNESSES IN FEDERAL STATE CASES IS ALSO COVERED. THE FINAL CHAPTER PRESENTS A SURVEY CONDUCTED BY THE NATIONAL ASSOCIATION OF ATTORNEYS GENERAL ON FREQUENCY OF USE OF IMMUNITY STATUTES IN THE STATES. APPENDIX A DESCRIBES EACH STATE'S LAWS REGARDING WITNESS IMMUNITY. APPENDIX B SUMMARIZES SOME ASPECTS OF THOSE LAWS. APPENDIX C SHOWS WHICH PROSECUTORIAL AUTHORITY MAY REQUEST IMMUNITY IN EACH STATE. THE REPORT IS HEAVILY FOOTNOTED WITH REFERENCES AND CASE CITATIONS. (GLR)