In his last face-to-face with Michael in Havana, Roth says: "My sixth sense tells me that your brother Fredo brought a bag full of money. Where is it?"
How did Roth know that Fredo brought the money? He might have inferred that Michael would have brought Fredo to Havana for only that purpose. His pals in the Cuban government might have tipped him (although if they knew he had $2 million in that suitcase they would have grabbed it).
Or, Fredo might have told Roth.
Your view?
TB, I think it's another chalk up to authorial license. If Fredo was in deep enough with Roth, then he would have been the one to inform Roth of it.
