I. Introduction

II. The Basic Exclusionary Principle … A. Rationale, Common Law Origins, Scope … B. Enactment and Approach of Rule 606(b)

III. Impeaching Verdicts under Rule 606(b) … A. The Basic Exclusionary Principle Applied … B. Exceptions to the Basic Principle … 1. Showing Extraneous Prejudicial Information … 2. Showing Outside Influence … C. Situations Beyond Reach of the Basic Principle … D. Procedural Problems-Interviewing Jurors; Motions; Hearings; Burden of Proof

IV. Impeaching Indictments under Rule 606(b)

V. Conclusion