An undated photo released on April 15, 2011 by Rio de Janeiro state's Public Safety Department (SESEG) shows Wellington Menezes de Oliveira, 24, posing with a gun. The gunman, Oliveira, killed 12 children at a Rio de Janeiro school and then himself, police said on April 7, shocking the South American nation that has never seen such an incident before. [Photo/Agencies]
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