How mass killings are defined
The database defines a mass killing as an attack in which four or more people have died, not including the perpetrator, within a 24-hour period. This definition is consistent with how the FBI defines mass killings.
Where have mass killings occurred?
MEMaine has seen 2 mass killings since 2006.WIWisconsin has seen 12 mass killings since 2006.VTVermont has seen 1 mass killing since 2006.NHNew Hampshire has seen 0 mass killings since 2006.WAWashington has seen 16 mass killings since 2006.IDIdaho has seen 3 mass killings since 2006.MTMontana has seen 1 mass killing since 2006.NDNorth Dakota has seen 3 mass killings since 2006.MNMinnesota has seen 4 mass killings since 2006.ILIllinois has seen 31 mass killings since 2006.MIMichigan has seen 16 mass killings since 2006.NYNew York has seen 21 mass killings since 2006.MAMassachusetts has seen 7 mass killings since 2006.OROregon has seen 7 mass killings since 2006.NVNevada has seen 4 mass killings since 2006.WY<tspan x="149.101" y="216.773" text-anchor="start"…
