In Ohio DUI/OVI cases, the prosecution sometimes introduces expert testimony. If a prosecutor intends to do so, the prosecutor must provide the defense attorney with a written report summarizing the expert’s testimony. According to the Ohio discovery rules, the report must be disclosed to defense counsel at least 21 days prior to trial. What happens when the report does not contain all the expert’s testimony or isn’t provided timely? A recent decision from the Ohio Supreme Court answers that question.