http://www.montrealgazette.com/news/Domenico+Arcuri+with+links+Rizzuto+clan+died/7363646/story.html

I gathered it, from this article.
It states that a roof collapsed onto him causing a cardiac arrest.
Also, he is living in Florida, not Montreal.
Unless, other details re-surface and state the cause of his death, otherwise....

Vito won't get any answers from him now.