Summary

Portrait of Potter Stewart Potter Stewart Namet v. United States — Opinion of the Court

We need not pass upon the correctness of the several lower court decisions upon which the petitioner relies, [8] for we think that even within the basic rationale of those cases reversible error was not committed in this case. In the first place, the record does not support any inference of prosecutorial misconduct. It is true, of course, that Mr. Fitzgerald announced that the Kahns would invoke their testimonial privilege if questioned. But certainly the prosecutor need not accept at face value every asserted claim of privilege, no matter how frivolous.
Source: Wikisource

Portrait of Potter Stewart Potter Stewart Namet v. United States — Opinion of the Court

The petitioner's principal contention is that reversible error was committed in permitting the Government to question the Kahns after it was known that they were going to claim their privilege not to incriminate themselves. It is said that when a witness is asked whether he participated in criminal activity with the defendant, a refusal to answer based on the privilege against self-incrimination tends to imply to the jury that a truthful answer would be in the affirmative. This inference, the petitioner argues, cannot properly be used as evidence against a criminal defendant.
Source: Wikisource

Portrait of Potter Stewart Potter Stewart Namet v. United States — Opinion of the Court

None of the several decisions dealing with this question suggests that reversible error is invariably committed whenever a witness claims his privilege not to answer. Rather, the lower courts have looked to the surrounding circumstances in each case, focusing primarily on two factors, each of which suggests a distinct ground of error. First, some courts have indicated that error may be based upon a concept of prosecutorial misconduct, when the Government makes a conscious and flagrant attempt to build its case out of inferences arising from use of the testimonial privilege.
Source: Wikisource

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