Two dead in shooting at Washington state high school
The Wall Street Journal - 10/24/2014
However, research by Northeastern University criminologist James Fox shows that the incidence of mass shootings, defined as four or more people killed by gunfire, has remained flat for more than three decades.
Several studies note that mass shootings account for a fraction of those murdered nationwide. Murder and non-negligent manslaughter claimed nearly 15,000 lives in 2012, according to the FBI. Mr. Fox said mass shootings kill about 100 people every year.