An officer secures part of the Virginia Tech campus where a gunman killed two people on Dec. 8, 2011
A gunman ambushed and killed a campus police officer and was later reported to have been found dead on Thursday at Virginia Tech University.
Virginia Tech is the site of one of the worst shooting rampages in U.S. history. In April 2007, 33 people were killed when a student went on a shooting rampage.
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