[Source.](https://mrctv.org/blog/p-gardner-goldsmith/crime-stats-expert-claims-fbi-cdc-undercount-armed-civilians-who-stop) [Here's a link](https://www.realclearpolitics.com/articles/2023/08/31/fbi_data_on_active_shootings_is_misleading_149699.html) to the John Lott Jr. article mentioned in the OP article.