Whether the variance between an indictment charging one conspiracy and proof establishing at least eight separate conspiracies was harmless under the federal harmless-error statute.
Holding
No. In the circumstances of this mass conspiracy trial, the variance and related errors substantially affected the petitioners' rights and required reversal.
Reasoning
The harmless-error statute required an appellate court to examine the whole record and disregard only errors that did not affect substantial rights. Its purpose was to prevent reversals for empty technicalities, not to permit convictions despite errors that naturally prejudice a defendant's fair-trial rights.
The proper inquiry was not whether the remaining evidence, viewed apart from the error, could support conviction. Nor was it whether an appellate court believed the defendants were factually guilty or would likely be convicted again at a proper trial. The question was whether the error had substantial influence on the jury's verdict, or instead left the reviewing court in grave doubt about that influence.
Berger v. United States did not control. Berger involved two conspiracies, four total participants, and a single person common to both agreements. Here, the Government proved at least eight distinct conspiracies involving many defendants, with Brown as the only common link. The difference in scale fundamentally increased the danger that evidence and guilt would spill from one alleged conspiracy to another.
A defendant's guilt is individual and personal, including in conspiracy prosecutions. Trying many independent schemes together invites jurors to transfer evidence, credibility judgments, and a generalized sense of wrongdoing from one group to another. The fact that each defendant may have separately committed an offense does not justify treating all defendants as participants in one large criminal enterprise.