Does a jury have to agree that there was a conspiracy between two defendants against each other in the same conspiracy?

The Mondacas also contend that the district court should have supplemented its instructions with instructions designed to guarantee that the jury reach a unanimous decision that both defendants participated in the same conspiracy charged in the indictment, and conspired with someone other than the government agent. A specific unanimity instruction is required: (1) if the jury indicates, by note to the court, that it is confused by the nature of the conspiracy; (2) if the indictment is "sufficiently broad and ambiguous so as to present a danger of jury confusion"; or (3) if the evidence is so factually complex that jury confusion may occur. United States v. Anguiano, 873 F.2d 1314, 1319-20 (9th Cir.), cert. denied, 493 U.S. 969 (1989). None of these circumstances is present here. Accordingly, the district court did not err by refusing to give a unanimity instruction.