It was this 40 year old guy, generally the whole games/movies context only comes up if the person in question is a teen. It would be hard to say that a "grown man" was influenced by video games.
By the way, ended up releasing the guy's name.
I would say this is the most thorough article about the incident (It also seems to keep getting updated as the story progresses).
http://www.cbc.ca/canada/story/2008/08/01/stabbing-victim.html
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