When a hearsay statement, or a statement defined in
Sec. 18.801(d)(2), (iii), (iv), or (v), 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, inconsistent with the declarant's
hearsay statement, 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.
