RULE 806. ATTACKING AND SUPPORTING CREDIBILITY OF DECLARANT

When a hearsay statement, or a statement defined in Rule 801(e)(2) (C), (D), or (E), or in civil cases a statement defined in Rule 801(e)(3), has been admitted in evidence, the credibility of the declarant may be attacked, and if attacked may be supported by any evidence which would be admissible for those purposes if declarant had testified as a witness. Evidence of a statement or conduct by the declarant at any time, offered to impeach the declarant, is not subject to any requirement that the declarant may have been afforded an opportunity to deny or explain. If the party against whom a hearsay statement has been admitted calls the declarant as a witness, the party is entitled to examine the declarant on the statement as if under cross-examination.