(e) Is absent from the hearing, and the proponent of a statement has been unable to procure the declarant's attendance or testimony by process or other reasonable means.
However, a declarant is not unavailable as a witness if such exemption, refusal, claim of lack of memory, inability to be present, or absence is due to the procurement or wrongdoing of the party who is the proponent of his or her statement in preventing the witness from attending or testifying.