Through the An Evidence-Based Approach to Understanding and Addressing Vicarious Trauma in Victim Assistance Professionals, Law Enforcement Officers and Other First Responders (AVT) project, the Office for Victims of Crime (OVC) will support the examination, assessment, identification, and pilot testing of evidence-based policies, practices, procedures, and protocols designed to facilitate an understanding and comprehensive addressing of vicarious (or secondary) traumatic stress in victim assistance professionals, law enforcement personnel, and other first responders who are subject to the impact of traumatic stress due to large-scale incidents of criminal mass violence or a series of exposures to an accumulation of traumatizing incidents. The goal of the project is ultimately to identify and test the effectiveness of state-of-the-art training and technical assistance to the victim assistance, law enforcement, and other first responder fields.