Sexual violence cases often present evidentiary questions and issues that are not in easily understood without the assistance of someone with specialized knowledge, training, and/or experience. This can involve challenges to understanding the presence or absence of medical evidence, the impact of toxicology on the human body, as well as the effects of trauma and the range of individual responses to sexual violence. Experienced professionals can provide judges and juries with the necessary context to ensure that they are making informed decisions based on the evidence and prevent misconceptions from negatively impacting the outcome of a case. The presenter will summarize the law related to the introduction of expert testimony and highlight the importance of deciding if and when to introduce expert testimony in a case.