Before times, you had propaganda of the deed, serial killers, political violence etc. keeping elites on their toes. Now the Columbine meta has solidified and that has turned Wal*Marts and public schools into shooting galleries for these rage-filled losers to maximize their KDR by shooting in high-density and low-defense areas.
<https://www.cyberdefinitions.com/definitions/KDR.html>
Kills are by the shooter, death is of the shooter.
(I'd meant to include that in my own prior comment.)