As was evidenced in the recent shooting incident at the Marjory Stoneman Douglas High School in Parkland, Florida and numerous other Active Shooter incidents, the perpetrators often exhibit disturbing or threatening behavior prior to the incident but it was not dealt with sufficiently to anticipate or prevent the event. Some perpetrators also shared with other persons their intent to do harm or exhibited desires/planning to harm themselves or others.
As reported by the local ABC affiliate, on August 3, 2016 a patron of the Travelodge Motel in Costa Mesa, CA was assaulted with a tire iron while confronting suspected thieves in the adjacent parking lot. Fortunately, the patron received only minor injuries and was treated at a local hospital. As can be seen in the reference articles below, confrontation of persons attempting property crimes has often resulted in physical harm or death to the victim. In matters in which I have provided consultation, these parking lot confrontations have resulted in a beating, a stabbing, and a shooting.
A simple internet search disclosed that there were over 40 school gun incidents in 2016, many resulting in injury or death to over 30 innocent individuals. Additionally, there were numerous incidents where it was reported that school campuses were placed in Lockdown because of potential threats in the immediate neighborhood. These Lockdown situations for threats in the surrounding neighborhood of our schools are reported regularly in the news media.