Do you refer to that guy meme who painted his guns and went into a church shot some people? I dont know buddy, I usually wait for reputable conspiracy theoriests to take the case and produce some videos about it, because all these shooter events always carry some additional connotations that media is unwilling to report on.
I suspend belief until some reputable conspiracy theorist starts making contents on it. What I can say about it is go check charles giuliani or some equivalent reputable conspiracy theorist with decades of experience in handling these cases.
You cant trust any info out there, exp from less reputable sources. Always listen to conspiracy contents, and assume all killers are fake until proved otherwise.