&amp;lt;a href=&amp;quot;http://www.cnn.com/US/9907/29/atlanta.shooting.01/index.html?iref=allsearch&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;Mark Barton&amp;lt;/a&amp;gt; walked into two Atlanta trading firms on July 29, 1999, and fired shots, leaving nine dead and 13 wounded, police say. Hours later police found Barton at a gas station in Acworth, Georgia, where he pulled a gun and killed himself. The day before Barton had bludgeoned his wife and his two children in their Stockbridge, Georgia, apartment, police say. The children&amp;#39;s birth mother and grandmother had been murdered six years earlier in Alabama. Barton was questioned but never charged in that crime.