Supreme Judicial Court, March 14, 2013

The United States Supreme Court ruling in Williams v. Illinois, 132 S.Ct. 2221 (2012), does not alter the Commonwealth’s rule that hold forensic expert opinion testimony, even if based on independently admissible facts or data not in evidence, does not violate a criminal defendant's confrontation rights because:  1) an expert witness is subject to cross-examination regarding that testimony; and  2) the expert witness also can be meaningfully cross-examined about the reliability of the underlying data.