A new study released this month through the FBI’s Law Enforcement Bulletin closely examines active shooters in the U.S. from 2000 to 2012. “A total of 110 active shooter events were identified through this process.”

As in other recent studies, this report revealed that the use of so-called “assault weapons” is rare in these incidents. The most common weapon used, in 59% of cases studied, was a handgun. 26% was a rifle, 8% was shotgun and 7% unknown.

In conclusion, the study cites the importance of civilian preparedness if caught in a situation like this.
“Civilians need to be trained about what to do if one of these attacks occurs,” They endorse the use of the teaching technique of Run, Hide, Fight.

They point out the average officer response time is 3 minutes. Unfortunately, response time information was not available for less than half the studied cases. In the 51 cases that included the data, the median response time was 3 minutes. This is fast by law enforcement standards!
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read more: http://leb.fbi.gov/2014/january/active-shooter-events-from-2000-to-2012