Homicides: 1/? Mass Murderers
Mass murderers are defined as killing four or more people in a single event and single location with no “cool off” period.
Eric Harris and Dylan Klebold: Columbine High School Massacre, 15 Dead, 24 Injured.
Seung-Hui Cho: Virginia Tech Shooting, 33 Dead, 17 Injured.
James Holmes: 2012 Aurora Shooting, 12 Dead, 70 Injured.
Dylann Roof: Charleston Church Shooting, 9 Dead, 1 Injured.
Matti Juhani Saari: Kauhajoki School Shooting, 11 Dead, 11 Injured.
Adam Lanza: Sandy Hook Elementary School Shooting, 28 Dead, 2 Injured.