Hail Turnbull...lol. I think Rocco was one of the traitors because it would have taken the consent of one of Michael's inner circle to hit him...someone who could allow the gunmen access to Michael's fortress and protection from discovery...someone who knew Michael's daily habits...someone who could walk in Michael's bedroom while Kay was sleeping and open the curtains...someone who could kill the assasins. I know Pentangeli could not have done those things. I don't believe Fredo could have either. I also do not believe that Fredo would have the courage to PERSONALLY take part in the hit. Fredo tells Johnny Ola in his middle of the night phone conversation, "You guys lied to me." Johnny Ola then replies, "Your brother won't find out." I believe Fredo did not want the hit to happen when he was on Michael's property. I don't think Fredo knew that the hit was going to happen that night. One interesting detail: check out the scene where Michael is greeting Johnny Ola and Rocco walks in with an orange. He is looking intently at Johnny Ola with a question mark expression. Michael takes the orange and says, "What's this?" Rocco says, "An orange from Miami." I think that orange was a signal to Rocco that the hit was going to be that night. And don't forget that Rocco was the man who would say, "Difficult...not impossible," when asked to assasinate an invulnerable target. What perfect Sicilian revenge to use Rocco to kill Roth and then have the assasin
bumped off by an FBI guy in the Corleone payroll.
To sum up: I think the logistics of the hit on Michael would have been impossible without Neri or Rocco.