Source, a NATSEC podcast run by an ex-CIA guy: https://xcancel.com/ShawnRyan762/status/1875278042144162200
Las Vegas PD confirming it: https://xcancel.com/ShawnRyan762/status/1875278042144162200
The r/trueanon discussion: https://www.reddit.com/r/TrueAnon/comments/1hsxcx4/vegas_cyber_truck_manifesto/
"Connor O’Malleys best work yet"
I managed to find an article from Newsweek which corroborates that the police thought the email was by him, but thank you for responding.
( https://www.newsweek.com/matthew-livelsberger-alleged-manifesto-read-full-email-sent-retired-soldier-2009573 )
There’s also this really fun letter he wrote, which a lot of publications have been quoting from, https://nevadacurrent.com/wp-content/uploads/2025/01/PO-003a-01-03-25-Livelsbergers-Letters.pdf