It is widely accepted that officers involved in shootings or other significant critical incidents require immediate support. The goal of these guidelines is to provide recommendations to public safety agencies, and the mental health providers who provide the service, to prepare and respond to the health and wellbeing of law enforcement personnel following an officer-involved shooting. The Guidelines were developed not to provide a rigid protocol but to offer information and recommendations to public safety agencies and their mental health providers that can be flexibly applied in response to the complex demands that may vary across jurisdictions following these incidents. Many of these recommendations are not only applicable to officer-involved shootings, but also other potentially distressing critical incidents and help to identify and assist those individuals at higher risk for experiencing and/or developing resultant mental health problems. Decades of experience by police and public safety mental health professionals, along with scientific research, suggest that following these guidelines can promote positive outcomes following such incidents.