Since the mass shootings have totally fallen off the radar and we have no clue as to why the Dayton perp did the deed, I found this article informative.
1st time hearing the name Ethan Kollie, who bought the guns and armor for Betts but had no idea that Betts was a lose screw.
https://heavy.com/news/2019/08/ethan-kollie/
Autopsy said he was up on cocaine.
Sister was going by male name and had some sexual identity issues.