Which case deals with impeachment evidence?

• A. Brady v. Maryland
• B. Giglio v. U.S.
• C. Miranda v. Arizona
• D. Ferguson v. City of Charleston

Answer: (B)

The case that specifically deals with impeachment evidence is Giglio v. U.S. In this landmark decision, the U.S. Supreme Court established that due process requires the disclosure of evidence that could be used to impeach the credibility of a witness for the prosecution. This case emphasized that if the government possesses evidence favorable to the defendant, which also affects the credibility of a witness, that evidence must be disclosed. This principle underlines the importance of ensuring a fair trial, as it allows the defense the opportunity to challenge the reliability of witness testimony, potentially impacting the outcome of the case.

In contrast, other cases listed focus on different aspects of legal rights and procedures. For instance, Brady v. Maryland pertains to the obligation of the prosecution to disclose exculpatory evidence, while Miranda v. Arizona addresses the rights of suspects during police interrogations. Ferguson v. City of Charleston involves issues related to the Fourth Amendment and the unauthorized search of a person receiving medical care. Each of these cases contributes important legal principles, but they do not specifically concern the area of impeachment evidence as defined by Giglio v. U.S.