c. Prior Consistent Statement: There are two situations in which a party may rehabilitate a witness by showing a prior consistent statement. First, if the testimony of the witness has been attacked by an express or implied charge that the witness is lying or exaggerating because of some motive, a previous consistent statement made by the witness before the onset of the alleged motive is admissible to rebut this evidence. Second, if the witness's testimony is impeached on some different ground (other than a general attack on the witness's character for truthfulness), such as an inconsistency or a sensory deficiency, counsel may introduce a prior inconsistent statement made by the witness if, under the circumstances, it has a special tendency to rehabilitate the witness's credibility. A prior consistent statement that is admissible to rehabilitate a witness's credibility also is admissible as substantive evidence of the truth of its contents.