Link
https://www.dailymail.co.uk/news/ar...just-lost-daughter.html?ico=related-replace-2
The same link provided long ago....
from the link said:(He) left a detailed manifesto and plan for the shooting at (his) home, and another in (his) car. Cops have yet to disclose its contents or a motive, but Nashville Metro PD Chief John Drake told NBC News he believed 'resentment' lay at the core of her behavior.
So, it is possible that Aiden resented his treatment at the school and held that resentment for years. (28 years old, so at least a decade).
also from the story said:Norma's own posts decrying school shootings and calling for increased gun control have emerged in the wake of Hale's massacre at the school she once attended.
On February 21, 2018, Norma posted a petition to make large-capacity gun magazines illegal to her page as a response to the horrors at Sandy Hook Elementary School in 2012.
And on March 8, 2018, she posted a petition to keep guns out of schools with the caption: 'So important!'
Please note Norma is Aiden's mother's name, not his deadname of "Audrey".