By testifying on another matter, a witness does not waive any privilege against self-incrimination for testimony that relates only to the witness's character for truthfulness.
N.H. R. Evid. 608
2016 NHRE Update Committee Note
The amendment made by supreme court order dated April 20, 2017, effective July 1, 2017, made stylistic changes to the rule.
In recommending these amendments, the Committee adopts the comments in the Advisory Committee Notes for Federal Rule 608, including 2003, including the following:
The Rule has been amended to clarify that the absolute prohibition on extrinsic evidence applies only when the sole reason for proffering that evidence is to attack or support the witness' character for truthfulness. . . . On occasion the Rule's use of the overbroad term "credibility" has been read "to bar extrinsic evidence for bias, competency and contradiction impeachment since they too deal with credibility." . . . . The amendment conforms the language of the Rule to its original intent, which was to impose an absolute bar on extrinsic evidence only if the sole purpose for offering the evidence was to prove the witness' character for veracity.
By limiting the application of the Rule to proof of a witness' character for truthfulness, the amendment leaves the admissibility of extrinsic evidence offered for other grounds of impeachment (such as contradiction, prior inconsistent statement, bias and mental capacity) to Rules 402 and 403