Virginia Tech Shooting

"Once, in English class at Westfield High School in Chantilly, Va., when the teacher had the students read aloud, Cho looked down when it was his turn, said Chris Davids, a Virginia Tech senior and high school classmate. After the teacher threatened him with an F for participation, Cho began reading in a strange, deep voice that sounded "like he had something in his mouth," Davids said.

"The whole class started laughing and pointing and saying, `Go back to China,'" Davids said."