MO SB1566

Expands disclosure requirements for prosecutors using informant testimony in felony or misdemeanor cases, requiring disclosure of the informant's identity, testimony substance, criminal history, cooperation agreements, and all written communications within 14 days of endorsement

Mandates that all phone or in-person communications between law enforcement/prosecution and informants be recorded by video or audio and provided to the defense

Creates a pretrial hearing process where defendants can challenge informant testimony reliability based on 14 factors, including corroboration, specificity, informant character, benefits offered, and prior testimony history

Establishes that failure to disclose required informant information constitutes a Brady violation, entitling the defendant to a new trial or vacated conviction, plus the right to seek civil compensation with no harmless error rule applying

Requires prosecutors to report informant usage data to the Missouri Office of Prosecution Services beginning January 1, 2026, and removes codefendants from the exemption that previously excluded them from the informant definition