Prof. Colin Miller has published an article about Fed. (Mil.) R. Evid. 606. Prof. Miller argues that, "Rule 606(b) to preclude
allegations of juror bias violate criminal defendants' right to present
a defense."
Dismissed with Prejudice: Why Application of the Anti-Jury Impeachment Rule to Allegations of Racial, Religious, or Other Bias Violates the Right to Present a Defense.
The Military rules of Evidence. are here.