The ED physicians in your hospital have recently suffered an increase of injuries from assaultive patients and family members. One doctor had to be hospitalized with head injuries after the most recent assault. Upon interview, co-workers inform you the security guard in the ED has been less visible of late. They have complained to the ED managers, to no avail. Using the resources and references provided in this chapter, create a plan for a root cause analysis of this latest incident and an injury prevention plan.