New York CPL Article 245 Discovery Reform: How Courts Are Handling Disclosure Failures Three Years In
Before 2020, New York's criminal discovery framework was among the most defendant-unfavorable in the nation. Prosecutors were required to disclose Rosario material — witness statements — only immediately before trial testimony, leaving defense counsel little time to investigate or impeach. The 2019 discovery reform legislation, effective January 1, 2020, overhauled this system entirely, replacing it with Article 245 of the Criminal Procedure Law, which mandates broad, automatic, and time-limited pre-trial disclosure.
Under CPL 245.20, the prosecution must disclose "all items and information that relate to the subject matter of the case" within 15 calendar days of arraignment in felony cases and within 35 days in misdemeanor cases — without a defense request. The mandatory disclosure category is expansive: witness lists with contact information, prior statements of prosecution witnesses, prior convictions of witnesses, all electronic recordings, expert witness disclosures, and any material exculpatory or impeachment evidence known to the prosecution. The law creates a reciprocal disclosure obligation for the defense as well, requiring disclosure of intention to offer alibi, insanity, or expert testimony.
Compliance has been uneven, and the courts have been sorting through the consequences for three years. The most litigated issue is the standard for dismissal under CPL 245.80, which provides that when the prosecution fails to comply with its disclosure obligations, the court "shall impose" one of several sanctions, including preclusion of evidence, an adverse inference instruction, a mistrial, or dismissal with prejudice — with dismissal reserved for cases involving "willful" noncompliance and prejudice to the defendant.
Appellate Division decisions have interpreted "willful" to mean something between accidental and deliberate — essentially, a knowing failure to take adequate steps to ensure compliance, even without bad faith intent to conceal. In People v. Watkins (1st Dept. 2023) and its progeny, courts have found willfulness where the prosecution failed to disclose body camera footage that was clearly in the agency's possession and obviously relevant, rejecting the argument that a disclosure failure is non-willful merely because it was not intended to disadvantage the defendant.
Prosecutors have developed a common litigation strategy: filing a certificate of compliance (CoC) to stop the speedy trial clock under CPL 30.30, while leaving categories of material undisclosed. Defense challenges to the facial validity of the CoC have generated their own body of law. Courts have held that a CoC filed without actual compliance is illusory and does not stop the 30.30 clock, meaning the case remains vulnerable to dismissal on speedy trial grounds independent of the Article 245 sanctions framework.
The practical advice for defense counsel is to immediately audit all disclosures upon receipt of the CoC, calendar the deadlines from arraignment, and file a specific written demand identifying categories believed to be missing. This creates a record showing the prosecution had notice of the gap. Courts have been more willing to impose meaningful sanctions — including dismissal — where defense counsel flagged the deficiency and the prosecution failed to cure before trial. Passive reliance on prosecutorial compliance without proactive follow-up has weakened some defense arguments at the sanction stage.