Paywall, and it's been a while, but I found this.
http://www.thehendersonnews.com/news/shooting-drill-to-be-held-on-monday/article_c51692a8-5c53-11e2-ab33-0019bb2963f4.html
Also one in 2017 in nearby Dallas.
https://www.govevents.com/details/23809/dhs-active-shooter-preparedness-workshop–dallas-tx/
Nate Cain aka DNC putting out the Q narrative.
https://twitter.com/dbongino/status/1097291062232666112
wrong pic
He knew full well what he was saying.