Giglio refers to what concept?

• A. A type of court motion to suppress evidence
• B. The district attorney's determination that a police officer's truthfulness is compromised and they should not testify in the future
• C. A standard for admissibility of expert testimony
• D. A form used to request discovery information

Answer: (B)

Giglio concerns impeachment material—information about a witness’s credibility that the prosecution must share with the defense. The rule requires disclosing to the defense any evidence suggesting a witness may not be truthful or could be biased, such as deals with prosecutors, promises of leniency, or other factors affecting reliability. That’s why describing the scenario as the district attorney determining a police officer’s truthfulness is compromised—and that the officer should not testify without disclosure—best captures the Giglio concept. Other options describe different legal ideas (a suppression motion, admissibility standards for experts, or discovery forms) and don’t fit Giglio’s focus on credibility-impeachment disclosure.