CHRISTIANSBURG, Va. (AP) SNIPPET: "Each time he looked up, Cox said, Zhu was on top of Yang, who was on the floor. Zhu stared at Yang's face as he cut through her neck, Cox said. "It wasn't really an angry face at all," said Cox, at that point the only witness to the gruesome events. "It was just a really blank, determined look." By the time police arrived, Zhu was holding the woman's head in his hand, an officer testified."