So I don't have all the information here and I hope someone does so we can learn from it. I don't like that the site left out that the guy burnt down the park office and was threatening people with a machete... There is a lot of info missing.
Edit: Here is the local news article I found. Not much more info yet. https://www.kenoraminerandnews.com/news/local-news/anicinabe-park-store-burned-beyond-repair-firearm-used-to-subdue-suspect