This article is by Dr. Brian Van Brunt and was originially published in the Journal of Campus Behavioral Intervention, (2013), 111–151. It is reprinted with permission of the National Association of Behavioral Intervention and Threat Assessment (NABITA). The article compares three potential perpetrators of violence across four assessment tools: the Workplace Assessment of Violence Risk (WAVR-21), the Structured Interview of Violence Risk Assessment (SIVRA-35), the NABITA Threat Assessment Tool, and History, Clinical, Risk (HCR-20) version 3.