Not really the page I linked had ~10 people age 40+:<p><pre><code>  age 36 SEPT. 28, 2012 Andrew Engeldinger 6 killed, 2 injured 
  age 43 APRIL 2, 2012 7 killed, 3 injured: Oakland
  age 41 OCT. 12, 2011 Scott Dekraai, 8 killed, 1 injured: Seal Beach, Calif.
  age 34 AUG. 3, 2010 Omar S. Thornton, 6 killed, 11 injured: Tucson, Ariz.
  age 45 FEB. 12, 2010 Amy Bishop 45: 3 killed, 3 wounded: Huntsville, Ala.
  age 39 November 5, 2009 Nidal Malik Hasan: fatally shooting 13 people and injuring more than 30
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Sure, you could say it&#x27;s mostly 14-45 but that&#x27;s true for most criminals and not that useful. And even just on that page there is Gian Luigi Ferri, age 55 JULY 1, 1993