He had written a love letter to Xin , but she told him she was engaged to another man , Montgomery County commonwealth 's attorney Bradley Finch told CNN . David Yang pleaded guilty to first - degree murder in the death of David Yang . Xin was attacked with a knife and decapitated at a party in January . They were believed to have known each other , but there was no sign of an argument . This was the first on the Virginia Tech campus since the 2009 shootings .
David Yang pleaded guilty to first - degree murder in the death of David Yang . Xin was attacked with a knife and decapitated at a party in January . They were believed to have known each other , but there was no sign of an argument . This was the first on the Virginia Tech campus since the 2009 shootings .