Clarence Thomas, White v. Illinois — Opinion of the Court
“ The Court has never explained the Confrontation Clause implications of a State's decision to adopt an exception not recognized at common law or one not recognized by a majority of the States. Our current jurisprudence suggests that, in order to satisfy the Sixth Amendment, the State would have to establish in each individual case that hearsay admitted pursuant to the newly created exception bears "particularized guarantees of trustworthiness," and would have to continue doing so until the exception became "firmly rooted" in the common law, if that is even possible under the Court's standard. ”
