Mass shooter who had screaming loud red flags on social media - should there have been intervention?

[repoman]

There are a lot of details to how this youtuber who worked at a grocery store went down a grievance killer rabbit hole.

Not sure which to focus on, here is an ok link about it. I would think that his youtube channel will be gone soon.

http://heavy.com/news/2017/06/randy-stair-weis-market-shooting-shooter-tunkhannock-pennsylvania-victims-photos-facebook/

Should police or mental health professionals have the ability to step in? What is the slippery slope for that?

 

[KeepTalking]

Here is another article on the shooting/shooter, with some background, for those who are unwilling, or unable, to visit heavy.com (like me):

http://www.cbsnews.com/news/weis-supermarket-shooting-gunman-posted-video-describing-plan/

I'm not sure how much Stair posted to Facebook, or other social media outlets before it was too late for anyone to take action, or if the police were ever aware of him. It seems from the CBS article that he kept a lot of this to himself, and only posted the bulk of his material online just before beginning his shooting spree. Heavy.com may possibly provide more information, but the work firewall has decided to block a good portion of the internet for me today, so I wouldn't know.