Im sure word did get sent to them as to what happened because like all they were curious, but if that did happen the word would of been, we don't know who did it. The Genovese weren't going to tell anyone they knew it was Gotti and that they were going after him. Like with Gigante only leaving Manhattan for doctors visits, prison, the only time Aiuppa and Cerone left their houses were to go to the courthouse for their trial. So much heat was on both sides at the time I don't see Salerno leaving East Harlem much less going with the Chin himself to a different state. and Aiuppa being the type of person he was, especially in the middle of a trial probably could of given two shits about Castellano or who did it.