SCOTUS Changes Admissibility of Expert Testimony In Criminal Cases
The Supreme Court issued a ruling in Diaz v. United States that changed the landscape for the type of testimony an expert witness can give regarding whether a criminal defendant had the requisite mental state to commit the crime of which he is accused—the type of “ultimate issue” evidence that has been deemed inadmissible in criminal cases for almost half a century. In a new article, Selendy Gay's attorneys examine the Court's majority and dissent opinions, as well as the ruling's potential impact on permissible expert testimony in criminal cases.
