The Mass Shooting Tracker (MST) defines a mass shooting as being more than 3 people shot in a single spree.
Soft Targets and Crowded Places (ST-CP)
The Most Comprehensive and Up-To-Date Online Data Depositary for Helping Society, the Systems, and the Venues to Learn about Mass Shootings
The Mass Shooting Tracker (MST) defines a mass shooting as being more than 3 people shot in a single spree.