TORONTO - Canadian police said yesterday that they still don't know what caused the death of a student from Beijing who was last seen alive on a webcam by a friend who witnessed her struggling with a man before the camera was abruptly shut off.
Police said the body of 23-year-old York University student Qian Liu was found Friday in her apartment in Toronto a few hours after her friend in China witnessed the attack. She was naked from the waist down, but there were no obvious signs of sexual assault or trauma that would have led to her death, police said.



