Mass public shootings have increased at an alarming rate over the past three decades and have become a growing concern for the people of the United States. It has appeared that approximately every few months, the media reports tragic incidents involving a single shooter targeting groups of people with the intention of harming or destroying lives for various reasons. Recent research data indicates that more than 80 public mass shootings have occurred in the United States since 1983. Some of the most recent shootings to date are: Marysville-Pilchick High in October 2014; Santa Barbara, California, in May 2014; Fort Hood, US Army base in Texas, in April 2014; Washington Navy Yard in September 2013; Sandy Hook Elementary, Connecticut in December 2012; In 2013, research by the Congressional Research Service (CRS) defined mass public shootings as events in a public place in which four or more people were injured or died as a result of gunfire. CRS also argued that the shooter usually selected his victims at random. J. Harris and R. Harris (2012) characterized public mass shootings as unleashed violence. Ironically, in the wake of each tragic public shooting identified above, there have been heated debates over gun control among political pundits, government officials and the American people, deliberations over the influence of the media and the entertainment glorifying violence, failings in mental health services and a commitment to remedying the problem but to no avail. In the absence of progress in combating public mass shootings, it was concluded that current research on mass violence was ineffective and in need of some modification (J. Harris and R. Response to survey questions will be answered by a thorough review and analysis of the literature. It is hypothesized that looser gun laws predict a higher rate of public shootings involving adult men aged 18 to 35 with non-mental illness. Meanwhile, untreated mental illness of men aged 18 to 35 predicted a higher rate of public shootings compared to that of other adult men who do not suffer from mental disorders.