Wikipedia:Articles for deletion/Red Bluff shooting
There is no universally-accepted metric for difining a “mass shooting.” The FBI, however, defines “mass murder” as an incident in which four or more people are either killed or injured. In this case, there were six. Apart from that, the shooting has received enough coverage from reliable sources to meet 
— User:KidAd, 08:09, 28 June 2020 (UTC)
Stance: keep
Cited policy: WP:SIGCOV (Wikipedia:Notability)