Discovery is a formal and informal exchange of information between the prosecution and the defense. The importance of discovery is to ensure that the adversary system does not give one side an unfair advantage. When it comes to discovery there are two types of evidence. Exculpatory, which is any evidence that may be favorable to the defendant at trail either by tending to cast doubt on the defendant’s quilt or by tending to mitigate the defendant’s culpability, thereby potentially reducing the defendant’s sentence, and impeachment evidence, which is any evidence that would cast doubt on the credibility of a witness. The Exculpatory Evidence Brady rule comes from the Brady v. Maryland in 1963. The U.S Supreme Court held that, “the suppression