What is a Giglio letter?

• A. A letter informing the officer of a promotion
• B. A letter sent to the officer's employer about the district attorney's decision concerning an officer's inability to testify at any future proceedings
• C. A letter advising the court to grant a motion
• D. A notice of suspension

Answer: (B)

A Giglio letter is about disclosure of impeachment or credibility information regarding a witness. Under Giglio, the prosecutor must reveal to the defense any information that could affect a witness’s credibility or their ability to testify, including decisions about whether a witness will testify in future proceedings. The option describing a letter sent to the officer’s employer about the DA’s decision concerning the officer’s inability to testify in future proceedings fits that purpose: it communicates information about the witness’s availability and potential credibility issues, which is exactly the kind of material the Giglio rule requires disclosed. The other options describe actions unrelated to impeachment disclosure—promotion, a court motion cue, or a suspension—so they don’t align with what a Giglio letter is used for.