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Adam Lanza was a 6th grader when he shot up Sandy Hook.

Before I ever got interested in school shootings, I thought Columbine WAS Sandy Hook.
I was so confused when I looked up something about Columbine and saw that it was in 1999, because I remember it being in the 2010s.
Then I realized I knew nothing about school shootings. And when I know nothing about something, it compels me to learn about that thing.
And now it's become an obsession.

I thought Barry Loukaitis killed two people.

I thought Dylann Roof was my age.

I thought that Randy Stair's victims were dozens instead of 4. I don't really know why, though

[You must be registered and logged in to see this link.] but he killed 3 people.

Russianman wrote:

[You must be registered and logged in to see this link.] but he killed 3 people.

Perpetrators fall victim to themselves, imo.