[americas.best.days...]

Unusual,female mass killer.

Equity.

[mware]

Can’t say I recall any woman Mass school shooter. School is K-6, makes kids no older than 11 ,twelve at most.

[Freedumb]

Unusual but it does happen. This one luckily only was able to murder one but the intent was a mass murder:

https://en.wikipedia.org/wiki/Murder_of_Nick_Corwin