In fiction hunches work well, in the real world there far less valuable.<p>In terms of mass shootings Muslims are far from the most common profile.  Seung-Hui Cho aged 23 for example killed 32 people and wounded 17 in VT on  April 16, 2007.  Jeffrey Weise, a 16-year-old killed 10 in Red Lake, Minnesota. 21 died at Columbine.<p>Go though: <a href="http:&#x2F;&#x2F;timelines.latimes.com&#x2F;deadliest-shooting-rampages&#x2F;" rel="nofollow">http:&#x2F;&#x2F;timelines.latimes.com&#x2F;deadliest-shooting-rampages&#x2F;</a> they don&#x27;t really fit just 1 or 2 profiles.