# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2018-11-15 17:22:45 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/1063120130606071808) RT @sarahkendzior: The FBI's list of red flags for a potential mass shooter match many unstable men on Twitter who engage in prolonged thre…