Is there any current research to look at the interplay in some US domestic foreign influence campaigns and stoichastic mass shooting events in the US and Canada

Is there any current research to look at the interplay in some US domestic foreign influence campaigns and stoichastic mass shooting events in the US and Canada? It seemed like there was a qualitative shift in the last decade to people who have been radicalized online and it seems to 1) have overlap with groups targeted for social influence campaigns like those documented in 2016 and 2) seems to have gotten pushed from a top down level also with the Russian funding and coordination (Torshin, Butina). It's very regrettable that the latest shooting seems to have be in part because the murderer was able to acquire semiautomatic high velocity rifles in the US (https://apnews.com/aeec329e92569a7b1bbdc44bc6aa2fa2 https://apnews.com/aeec329e92569a7b1bbdc44bc6aa2fa2) and it would be interesting to trace how he was able to get the information necessary how to acquire them and from whom. It is strange - absent some coordinating mechanism - that armed protesters are acting in unison in multiple states against covid-19 quarantines and restrictions.