Mass Shooting Events

**Definition:** A mass killing by firearm that consists of 3 or more killings in a single incident (H.R.2076 – 112th U.S. Congress (2011-2012): Investigative Assistance for Violent Crimes Act of 2012).

**Tree numbers:** - I01.198.240.470.786 - I01.198.240.856.519.500 - I01.198.240.856.800.537.500 - I01.880.735.344.750 - I01.880.735.900.632.500 - I01.880.735.900.800.575.500 - N06.230.100.160.500

**Synonyms:** - Mass Shooting - Shooting Spree