Over the past several years, American educational institutions have seen an increase in gun violence by students. This increase has erupted calls for stricter gun control and larger gun-free zones at institutions of learning. There have been many theories to why American schools have become a place of fear instead of institutions of learning. Some explore the cause of mental illness; some investigate bullying, and a few acknowledge the lack of administrative follow-up on in-school incidents. This chapter will explore the relationships and correlations between the shooter, the victim(s), school zero-tolerance policy and how previous incidents of violence or threats of violence were/are processed in the school systems where these incidents have occurred.