Evidence Commons^™

'Materiality' Limits Prosecutors' Duty To Disclose Exculpatory Evidence To Defense, James K. Knight Jr.

Mercer Law Review

In United States v. Agurs, the U.S. Supreme Court held for the first time that criminal prosecutors have a constitutional duty to voluntarily disclose exculpatory evidence to a defendant even when the defense doesn't request such evidence. The Court, however, limited the scope of this new obligation by narrowly defining the category of material evidence to which it applies. It held that the duty arises only when the exculpatory evidence is so material that had it been disclosed, its use at trial would have created a reasonable doubt of the defendant's guilt that did not otherwise exist.

Respondent Agurs …