Criminal procedure; disclosure of evidence; effective date.

HB 3503 requires Oklahoma prosecutors to disclose specific evidence to criminal defendants within 30 days of their initial court appearance. It mandates disclosure of witness information, law enforcement reports, statements from the accused or codefendants, expert test results, and all evidence that could help the defense (like impeachment evidence or information reducing charges). The bill also adds a 30-day advance notice requirement for prosecutors planning to use jailhouse informants, including their criminal history and any deals offered. This bill directly affects defendants, prosecutors, and law enforcement in criminal cases by expanding and clarifying disclosure obligations under Oklahoma law.