Whether we are highly trained, experienced professionals or new to the field of risk assessment, evaluating a subject’s risk of violence is challenging. This is due to a variety of factors, including: professionals differ in their training, experiences, and expertise; each case is unique and the circumstances vary considerably; and all people are susceptible to a variety of cognitive biases that may affect their decisions. Ultimately, however, organizations look to us to evaluate an uncertain future and provide actionable guidance to prevent violence. Fortunately, structured professional judgment (SPJ) tools are designed to help trained evaluators systematize the complicated process and maximize the likelihood of prevention.