Tests are being done on remains found in a Montreal park that a police source says appear to be a human head.
   
Police are trying to determine if the remains might be connected to the case of Chinese university student Jun Lin, who was murdered and dismembered in late May.
   
Lin's torso was found stuffed in a suitcase and other body parts were mailed to Vancouver and Ottawa, but his head has not been found.
   
Luka Magnotta,a 29-year old former porn actor, has pleaded not guilty to charges of killing Lin and defiling the corpse.
   
His preliminary hearing is set for next March.
   
(The Canadian Press)