By Suzana Popovic-Montag ( December 11, 2025, 12:02 PM EST) -- When issues arise in litigation that involve specialized knowledge, technical expertise or scientific understanding, it is relatively common for the parties to submit expert evidence to assist the court with making its determinations. Expert evidence may be admissible on a wide range of issues — even specialized legal issues — so long as the evidence is proffered by a properly qualified expert, is relevant and necessary, and is not barred by an exclusionary rule....