Whether Molina's substantial rights were affected by dual-role testimony

QUESTIONS PRESENTED 1. Whether Molina’s substantial rights were affected when two-thirds of the Government’s witnesses testified in dual roles as experts and fact witnesses but no protective steps were taken to prevent the dual roles from confusing the jury? 2. Whether relying on inconsistent and unreliable testimony of cooperating witnesses to determine drug quantity and quality for sentencing purposes violates the Fourteenth Amendment and conflicts with precedent of the Seventh Circuit? 3. Whether the district court imposed a trial penalty in violation of the Sixth and/or Fourteenth Amendments? i