Casue of death has not conclusively been determined yet. Several circumstances led up to the tasering by the police. They made some serious
procedural mistakes but Vancouver Airport deserves some blame as well for not assisting the victim for houes on end. This article soums things up quite well. I think it is suggested reading. It is a tragic story indeed.
http://www.nytimes.com/2007/11/16/world/...nyt&emc=rss