As part of a recent assessment of DoD’s workplace violence prevention programs, researchers reviewed the implementation status of the mandatory Prevention, Assistance, and Response (PAR) capabilities. The review found a number of barriers to implementation, many due to the fact that the PAR concept emerged from a complex array of insider threat events and policies related to workplace violence prevention, counter-insider threat, and personnel vetting. The purpose of this Research Note is to analyze this history to help policymakers move forward with efforts to integrate various stakeholders’ needs into a comprehensive strategy to protect the DoD workforce.