Bus passenger beheaded seat mate, witness says

As horrified travelers watched, a Greyhound Canada bus passenger repeatedly stabbed and then decapitated the young man sitting beside him, who was sleeping with his head leaning against the window, a witness said Thursday.

"There was a blood-curdling scream. I was just reading my book, and all of a sudden I heard it," said Garnet Caton, who was sitting in front of the two men.

"It was like something between a dog howling and a baby crying, I guess you could say. I don't think it will leave me for a while."