That's simple on the Scoppa brothers.... It was definitely Sollecito/Rizzuto. Even in Scoppa's book they detailed the meeting of Woolley, Rizzuto and Sollecito where Woolley mentioned that Sal Scoppa talked too much and should be dealt with with bullets to chest and Sollecito agreed but Rizzuto didn't prompting a response from Steve Sauce. Like Andrea said, Steve Sauce had Sal killing for him then decided he was a liability and wanted them both gone, especially if Andrea is to be believed that Steve bought him out of drug territory and owed him millions like he complained about, it's just more of a reason to kill both. Not sure how Roberto got away as well considering he is somewhat active around Montreal obviously with drugs and it was said he had dealings in the trash business with Andrea as well.