I found this little reference by accident this morning titled Black Swans, Shark Attacks, & Mass Shootings by Matthew Larosiere. It is a short read, but well documented with FACTUAL information and references and really drives home that the craze about mass shootings is rather unfounded. Your chance of being murdered in a mass shooting is 1 in 11.6 Million/Year. In fact, you stand a much higher chance of death by choking on food. Take a look, worth the 10 minutes or so to read through it.