Cool v. United States

1972-12-04

Headline: Court reverses conviction for jury instruction that barred a defendant’s use of an accomplice’s exculpatory testimony unless jurors found it true beyond a reasonable doubt, protecting defendants’ ability to present witnesses.

Holding: The Court reversed the conviction and held that a jury may not be told to ignore a defense accomplice’s testimony unless the jury first finds that testimony true beyond a reasonable doubt.

Real World Impact:

Stops judges from requiring defendants to prove innocence before jury may consider accomplice testimony.
Makes it easier for defendants to present exculpatory witnesses without an impossible reliability test.
May lead to retrials or new jury instructions in similar cases.

Topics: criminal trials, jury instructions, defense witnesses, reasonable doubt

Summary

Background

A woman and her husband were tried after police found counterfeit bills in their car. A man who had been traveling with them, Robert Voyles, admitted he passed counterfeit bills and pleaded guilty, but he testified that the woman and her husband did not know about the bills. The woman relied on Voyles’ testimony to show she did not knowingly possess the bills. At trial, the judge gave an “accomplice” instruction over the defense’s objection.

Reasoning

The Court considered whether a jury may be told to disregard an accomplice’s defense testimony unless the jury first finds that testimony true beyond a reasonable doubt. It held that such an instruction improperly blocks a defendant’s right to present exculpatory testimony and undermines the requirement that the Government prove guilt beyond a reasonable doubt. Because the instruction made the jury treat the defense witness as irrelevant unless the witness was extremely believable, the Court reversed the conviction and ordered further proceedings consistent with this ruling.

Real world impact

The ruling protects criminal defendants who depend on co‑witnesses or accomplices to clear them by ensuring such testimony can be considered without an impossible reliability test. Trial judges must not condition consideration of defense accomplice testimony on a preliminary finding of truth beyond a reasonable doubt. The decision may lead to new trials or different jury instructions in similar cases.

Dissents or concurrances

Justice Rehnquist, joined by two colleagues, dissented. He argued the charge should be read in context of many instructions emphasizing the Government’s burden and that the defense’s objection was not clearly raised; he would have affirmed the conviction.