Cammalleri was the brother of Leonardo who was Vito's father-in-law. Cammalleri family comes from cattolica eraclea,sicily. They emigrated to Toronto area in 1950's Leonardo was fleeing a murder charge in Sicily Giuseppe spagnolo I think.
As far as his role in Toronto nothing has ever come to light about it.
Some books suggest he was Vito's top guy or the top Sicilian in the city.
Never come across his name in indictments recently a very good question.
I also know of a few in the MTL area with same last name Domenico being one who was shareholder in company run by the Arcuri family.