---
url: 'https://ga.giglio-bradylist.com/giglio-v-united-states'
title: 'Giglio v. United States'
author:
  name: 'Johann Drolshagen'
  url: 'https://ga.giglio-bradylist.com/user/johann-drolshagen'
date: '2023-11-20T21:12:58+00:00'
updated: '2023-11-21T23:04:33+00:00'
type: page
summary: 'No. 70-29 Argued October 12, 1971 Decided February 24, 1972 405 U.S.'
published: true
---
 ##  [Giglio v. United States](/giglio-v-united-states) 

 No. 70-29

Argued October 12, 1971

Decided February 24, 1972

405 U.S. 150

 

In Giglio, the Court held that the prosecution's failure to inform the jury that a witness had been promised not to be prosecuted in exchange for his testimony was a failure to fulfill the duty to present all material evidence to the jury, and constituted a violation of due process, requiring a new trial. This is the case even if the failure to disclose was a matter of negligence and not intent. The case extended the Court's holding in *Brady v. Maryland*, requiring such agreements to be disclosed to defense counsel. As a result of this case, the term *Giglio material* is sometimes used to refer to any information pertaining to deals that witnesses in a criminal case may have entered into with the government.