W.va. R. Evid. 606
COMMENT ON RULE 606
Rule 606(a) has not been changed and was taken directly from the current state rule. The federal counterpart is slightly different. The federal counterpart provides that a juror "may not" testify; whereas the state rule provides that a juror 'shall not" testify. The federal rule also provides that a court "must give a party an opportunity to object" to a juror testifying; whereas the state rule indicates the issue is preserved without an objection. To avoid the misleading impression that a trial court has discretion to allow a juror to testify at trial, the existing provision remains in the rule.
Rule 606(b) was taken verbatim from its federal counterpart. Except for Rule 606(b)(2)(C), the revised Rule 606(b) is substantively the same as the current rule, but is organized differently for greater clarity. Rule 606(b)(2)(C) was added to the federal rule in 2006. This provision allows a juror to testify that a mistake was made in entering the verdict.