It was Nick Rizzuto with the backing of Carmine Galante. I heard they approached someone in Auburn NY. That is Buffalo territory, and the Monachino's were in charge of Auburn, it could have been Joe Monachino, but at the time I think he was only a soldier, but his uncle Pat had strong interest in Canada, mainly in Toronto. By the time they made the move on Violi, he was the last brother left, Joe and Vincenzo we're both dead, Gabe was dead, Charlie was dead, Frank was in prison along with Paolo, and Salvatore, and Gaetano fled Canada. A couple of others switched to the Buffalo crew in Canada. After the hit a few others joined Nick Rizzuto.