Chinese college student to be deported after buying guns

[CS1983]

OK.. A crazy guy commits a mass shooting and the FBI and local police "miss" obvious red flags and the internet goes wild saying that the cops should have done something.. The cops do something when they see potential red flags and the internet goes crazy saying that he has yet to commit a crime and this is tyranny..

So.. Which is it?

How exactly is acting like a spoiled rich boi of Beijing a warning sign to a mass shooting? Had he made threats? Was he demonstrating self-destructive behavior?
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Aloha -- how does referring to a rifle as a sniper rifle pop as a red flag? I realize that in due deference to actual snipers and connotations thereof, many competitions cast themselves as "precision" and not "sniper", but let's be honest...

[def90]

How exactly is acting like a spoiled rich boi of Beijing a warning sign to a mass shooting? Had he made threats? Was he demonstrating self-destructive behavior?
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Aloha -- how does referring to a rifle as a sniper rifle pop as a red flag? I realize that in due deference to actual snipers and connotations thereof, many competitions cast themselves as "precision" and not "sniper", but let's be honest...

Per the article the perps actions "alarmed a roommate and a friend" both of which then went to a school official. The school official then contacted law enforcement. I'm guessing that a friend and a room mate would know the guy well enough to know that something had changed and was not right in him other than simply dying his hair and buying a Corvette. The article doesn't even go in to what these two may have witnessed or told the school and law enforcement.

[Aloha_Shooter]

Aloha -- how does referring to a rifle as a sniper rifle pop as a red flag? I realize that in due deference to actual snipers and connotations thereof, many competitions cast themselves as "precision" and not "sniper", but let's be honest...

How is it NOT a red flag when combined with the other data? Who do you know that refers to their target, hunting, or competition rifles as "sniper rifles"?