&gt; He also had the distinction of being a pretty smart guy, which is unusual for the demographic that gets into mass murder.<p>I actually thought it was fairly common for mass killers (other than those whose mass killing is confined to a single mass casualty attack &#x2F; killing spree), if for no other reason than not being smart makes it more likely that you get caught <i>before</i> your killing reaches the level of &quot;mass&quot;.