Ragusa was not involved. It has been said, by many, especially in Montreal. He is not capable of pulling off a feat, like that. He was notorious for drugs, only.

It was said by Vitale n Massino through their testimonies, that the person DID come from Canada but NOT Montreal.
Also, Emanuel was an ALIAS NAME, chosen because this guy's father's name, was Emanuel.
He lived in NYC before, but deported back to Italy and held a different alias name, at that time, too.
Therefore, this person knew NYC very well, for his escape, after the mayhem which would ensue.
They said, this Emanuel had a relation to George from Canada, in some way. Which Messino n Vitale could not distinctly recall, how??