The funny thing is that there is nothing concrete to prove that Rocco was EVER in on the Tahoe hit attempt. All the theories have come from people's heads because of things implied throughout the movie. Rocco was head of security at Tahoe, Neri and Rocco had an underlying power struggle and Rocco was seemingly sent on a suicide mission by Michael.

I think this is proof that Part II is simply an amazing movie. That nothing can be said or shown to say that Rocco was involved with the Tahoe hit -- and yet many, many people agree that Rocco was in on it.

I personlly don't believe he was. But that's just me.

That leads me to another question... was Ola at the Tahoe compound? Could he have been the one to kill the bodyguards and get away through the tunnels? Or did he leave after his meeting with Michael?