Rule 804. Exceptions to the Rule Against Hearsay—When the Declarant is Unavailable as a Witness

(a) Criteria for Being Unavailable. A declarant is considered to be unavailable as a witness if the declarant:

(1) is exempted from testifying about the subject matter of the declarant’s statement because the court rules that a privilege applies;

(2) refuses to testify about the subject matter despite a court order to do so;

(3) testifies to not remembering the subject matter, except as provided in Rule 803.1(4);

(4) cannot be present or testify at the trial or hearing because of death or a then-existing infirmity, physical illness, or mental illness; or

(5) is absent from the trial or hearing and the statement’s proponent has not been able, by process or other reasonable means, to procure:

(A) the declarant’s attendance, in the case of a hearsay exception under Rule 804(b)(1) or (6); or

(B) the declarant’s attendance or testimony, in the case of a hearsay exception under Rule 804(b)(2), (3), or (4). But this paragraph (a) does not apply if the statement’s proponent procured or wrongfully caused the declarant’s unavailability as a witness in order to prevent the declarant from attending or testifying.

Comment. Pa.R.E. 804(a)(3) differs from F.R.E. 804(a)(3) in that it excepts from this rule instances where a declarant-witness’s claim of an inability to remember the subject matter of a prior statement is not credible, provided the statement meets the requirements found in Pa.R.E. 803.1(4). This rule is otherwise identical to F.R.E. 804(a). A declarant-witness with credible memory loss about the subject matter of a prior statement may be subject to this rule.