The nurses in the ED of your hospital have recently suffered an increase of injuries from assaultive patients and family members. One nurse had to be hospitalized with head injuries after the most recent assault. Upon interview in the ICU, her co-workers inform you that the security guard in the ED has been less visible of late. They have complained to their nurse manager, 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.