Last week, the Supreme Court reaffirmed in Smith v. Arizona, No. 22-899 (June 21, 2024), that criminal defendants have a Sixth Amendment right to confront experts who provide forensic evidence for the prosecution. This right extends to testimonial statements by experts whose testing and opinions form the basis of a different expert’s opinion.
This issue should have been straightforward. The Supreme Court has long held that criminal defendants have a Sixth Amendment right to confront witnesses who provide forensic evidence against them. Thus, if a prosecutor wants to introduce the results of forensic testing, the defendant must have an opportunity to cross-examine the analyst responsible for the test. See Bullcoming v. New Mexico, 564 U.S. 647, 658 (2011); Melendez-Diaz v. Massachusetts, 557 U.S. 305, 314-15 (2009).
But a defendant’s confrontation right extends only to “testimonial hearsay”—that is, out-of-court testimonial statements offered for their truth. And courts have …