Section 9-5.001 of the United States Attorney's Manual describes the Department's policy for disclosure of exculpatory and impeachment information. The Brady rule, named after Brady v.Maryland, requires prosecutors to disclose material, exculpatory information in the government's possession to the defense. We found references to Brady material in various documents, including local rules, orders (including standing orders and standard discovery, arraignment,. To establish a Brady violation, you must be able to show that the evidence is material and exculpatory based on the circumstances of your case. What You Will Learn. It is a good practice to have a column in the spreadsheet to mark if a document contains exculpatory evidence. A. Other than Brady material, no constitutional right to discovery. 2003), prosecution objected to adequacy of defense notice of psychological expert as well as nature of opinion; court struck testimony. Evidence is material if its.