Law enforcement officers work to load a police vehicle onto a tow truck at the site where a Virginia Tech Police Officer was shot and killed at Virginia Tech University Blacksburg, Virginia December 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, the site of one of the worst shooting rampages in U.S. history. REUTERS/Chris Keane (UNITED STATES - Tags: CRIME LAW EDUCATION)