When a criminal defendant moves to disclose the identity of a confidential informant under Roviaro v. United States, 353 U.S. 58 (1957), and makes a threshold showing—unrebutted by the government—that disclosure is relevant and helpful to a defense, may a court deny the motion without holding an in camera hearing?

QUESTION PRESENTED When a criminal defendant moves to disclose the identity of a confidential informant under Roviaro v. United States, 353 U.S. 58 (1957), and makes a threshold showing—unrebutted by the government—that disclosure is relevant and helpful to a defense, may a court deny the motion without holding an in camera hearing? prefix PARTIES,