http://www.gunnuts.net/2014/01/28/priva ... shootings/
On the 24th, the FBI released one of the most fascinating and simultaneously frustratingly incomplete studies in recent memory: Active Shooter Events from 2000 to 2012. This paper looks at active shooter events over a 12 year span with the goal to assess law enforcement reactions and how to improve the response at the LE level. There is a ton of interesting data for us to unpack in this paper, but for today we’re going to focus on the section titled “Resolution of the event” because to the average CCW holder that’s the most interesting. This section uses 104 incidents for its base set. Note that for the purposes of the study, the average police response time was about 3 minutes. Out of 104 incidents, they had the following resolution:
49% of events stopped before the police could arrive
42% of events (44 total) resulted in the killer committing suicide, of which 29 killers committed suicide prior to police arrival.
43% of events (45 total) result in the attacker being stopped with force, either by civilians or law enforcement.
When civilians intervene before LE arrives, they stop 33% of mass shootings.
Slightly less than 3% of mass shootings are stopped by armed civilians shooting the attacker.