Do federal criminal defendants have a constitutional right to a specific unanimity instruction requiring the jury to unanimously define the duration and membership of the large conspiracy charged in the indictment where the evidence at trial established that the defendants were members of conspiracies different from the much larger overarching conspiracy charged against them?

QUESTIONS PRESENTED FOR REVIEW Do federal criminal defendants have a constitutional right to a specific unanimity instruction requiring the jury to unanimously define the duration and membership of the large conspiracy charged in the indictment where the evidence at trial established that the defendants were members of conspiracies different from the much larger overarching conspiracy charged against them? 2