Whether the Fifth Amendment, applicable to the States through the Fourteenth Amendment, permits a prosecutor or trial judge to invite the jury to treat a criminal defendant's failure to testify as evidence of guilt.
Holding
No. The Fifth Amendment forbids both prosecutorial comment on an accused's silence and judicial instructions that the silence is evidence of guilt.
Reasoning
The Court treated California's rule as more than a neutral acknowledgment that a defendant did not testify. By authorizing the prosecutor to argue from silence and the judge to instruct on its evidentiary significance, the State effectively offered the defendant's silence as evidence for the jury's use. The absence of a formal evidentiary offer did not change the practical effect of the procedure.
Adverse comment imposes a penalty for exercising the constitutional privilege not to testify. It makes invocation of the privilege costly: a defendant who remains silent risks having that choice affirmatively presented to the jury as support for the prosecution's case. The privilege against self-incrimination cannot retain its force if courts may punish its exercise in that way.
The Court rejected the argument that the relevant inference is merely natural and unavoidable because jurors will notice a defendant's silence anyway. A jury's possible unaided inference differs materially from an inference the court officially endorses and the prosecutor presses as proof. Judicial approval gives the inference special weight and transforms silence into state-sponsored evidence against the accused.
Moreover, silence has explanations other than guilt. An innocent defendant may be timid, nervous, unable to withstand cross-examination effectively, or concerned that prior convictions will be used to impeach him. Because silence is equivocal, permitting the State to characterize it as incriminating undermines the presumption of innocence and the accusatorial character of the criminal process.
Malloy required the same Fifth Amendment standards in state and federal proceedings. Although a federal statute had long prohibited comment on a federal defendant's failure to testify, the Court held that the constitutional privilege itself—not merely the statute—bars the practice. California's contrary rule was therefore unconstitutional, and Griffin's conviction was reversed.