CBC had a good news story on this.
http://www.cbc.ca/canada/manitoba/story/2008/07/31/greyhound-transcanada.html
Caton described the attacker as surprisingly calm. "It was like he was at the beach or something. There was no rage in him. He wasn't swearing or cursing or anything. It was just like he was a robot or something."
Police cruisers arrived about 10 minutes after the attack began, he estimated, and officers began directing passengers to school buses to take them to a hotel in Brandon.
"While we were waiting on the side of the road, [the attacker] was taunting the police with the head in his hand," said Caton.
http://www.cbc.ca/canada/manitoba/story/2008/07/31/greyhound-transcanada.html