Virginia Tech graduate student Xin Yang was killed during an attack at the school's Graduate Life Center on January 21, 2009. According to reports, the 22-year-old Yang was decapitated, allegedly by fellow graduate student Haiyang Zhu. Authorities said the Yang and Zhu knew each other; he was reportedly listed as an emergency contact. There was no immediate word on a motive for the murder. Zhu was arrested minutes after the killing; he was charged with first-degree murder.CNN: Killer decapitates Va. Tech student, police say (January 22, 2009)