MEMORANDUM

Since 1963, a series of United States Supreme Court case decisions  have clarified that in criminal cases, prosecutors must disclose to the  defense evidence favorable to the defendant. This includes information  that may be used to impeach the credibility of government witnesses,  including law enforcement officers. These decisions mean that police  officers who have documented histories of lying in official matters are  liabilities to their agencies, and these histories may render them  unable to testify credibly. 

Part 1: Please write a professional memorandum summarizing  the main issues that are involved in the following United States Supreme  Court cases. You must have at least 2.5 pages not including your title  page. 

• Brady v. Maryland, 373 U.S. 83      (1963)
• Giglio v. United States, 405 U. S.      150 (1972)
• United States v. Agurs, 427 U. S.      97 (1976)