So it seems the shooter seemed very normal to anyone who knew him, never expressed any political rant, spoke well in French, etc. He was apparently a very "demanding" but good business man with a fishing business and some other similar business, something hunting-related I think. Supposedly was very religious. There is a picture of him in Vegas with Celine Dion, where he assisted to her show as a VIP (anyone can be VIP for $2500 and have their photo taken with her).
So overall no signs that he was crazy, except one person who said he showed maniacal tendencies after retiring, but I haven't seen that corroborated elsewhere.
Must have just gone crazy recently, maybe schizo. I mean compared those pics to the ones of his arrest.
edit: Ok so new details say the guy had mental problems according to a close friend, was seeing a doctor. Also bought $50,000 worth of provisions during the H1N1 scare, and has a couple of military vehicles. Was also apparently very religious, citing apostles.
http://www.radio-canada.ca/nouvelle...002-metropolis-richard-bain-comparution.shtml
Also, the weapon may have been a CZ-858, which yes, can be bought legally and would have had to be registered. Another good reason to keep the gun register.