This special joint session with shared interest from the Forensics Professional Technical Group and the Safety Technical Group presents an enactment of human factors expert testimony for a trial involving the use and possible misuse of a child’s transportation safety product: a used car seat. The mock trial session presents human factors issues related to the use of the product, including packaging and instructions retention, expectations, user environment, and foreseeable use/misuse of this product. Human factors experts for the plaintiff and the defense will each weigh in on the circumstances surrounding the injury, with examination from the respective attorneys, and cross examination from the opposing attorneys. An attorney commentator will provide reactions and explanation of how the information will be used after each side has given its testimony. No judgment or verdict on the case will be reached at the end of the session.