We are still waiting for SCOTUS to answer this question. In the meantime, you might read this update on the Confrontation Blog. If you have this issue in the trial or appellate courts, you might find want to review this white paper tracking the different approaches used by courts around the country. Who knows? Your case could be the one SCOTUS takes.
Are autopsy reports testimonial statements under the Confrontation Clause?
Previous post: An argument against mental health courts