According to “United States Active Shooter Events from 2000 to 2010: Training and Equipment Implications” by J. Pete Blair and M. Hunter Martaindale from Texas State University:

• The most commonly used weapon (60 percent) by active shooters was a pistol.
• Attackers carried multiple weapons in 41 percent of the attacks.
• The active-shooter attacks ended before the police arrived 49 percent of the time.
• In 56 percent of the attacks that were still ongoing when police arrived, the police had to use force to stop the killing.
• The median number of victims killed is two. The median number of victims shot by the suspect is four.

RELATED STORIES

5 Must-Dos to Survive & Escape A Mass Shooting

10 Cases Where An Armed Citizen Took Down An Active Shooter

How to Take Down an Active Shooter with a Knife

Workplace Violence: Defend and Escape an Active Shooter at the Office

Survive A School Shooting: Crisis Plans for the Classroom

Street Smarts: Active Shooter Takedowns & Tactics

Active Shooter Simulators Giving LEOs a Virtual Prep

Tips and Tactics for Neutralizing an Active Shooter

8 Active-Shooter Response Bags For Rapid Deployment

44 Professions For Whom Carrying A Handgun Is A Good Idea

Too Close For Comfort: Stalking Warning Signs & Safety Tips