Daniel Renaud has mentioned them several times in past articles and he has refered to them as being the head of their own clan according to police sources.
If your definition of boss is what Vito Rizzuto was, then no one is a boss at this moment because ever since Vito Rizzuto went to jail no one thus far has been able to take real control and be boss. There has been numerous attempts but they all failed. The Montreal mafia is fractured having heads of different clans trying to overpower the other.This is my version of events.