Disclosure of Facts or Data Underlying Expert Opinion; Hypotheses Not Necessary

Unless the court orders otherwise, an expert may testify in the form of an opinion or inference, state an opinion, and give reasons for it, without first testifying to the underlying facts or data. The expert may be required to disclose those facts or data on cross-examination. Questions calling for the opinion of an expert witness need not be hypothetical in form unless in the court’s discretion a hypothetical is required. NOTE : Adopted September 15, 1992 to be effective July 1, 1993; amended September 15, 2004 to be effective July 1, 2005; amended September 16, 2019 to be effective July 1, 2020. MISSION STATEMENT We are an independent branch of government constitutionally entrusted with the fair and just resolution of disputes in order to preserve the rule of law and to protect the rights and liberties guaranteed by the Constitution and laws of the United States and this State. ESSENTIAL LINKS