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Criminal Discovery: What it is and How it is Used by the Defense
In the United States, the discovery process in the criminal justice system is governed by federal and state laws and rules of criminal procedure. For example, Federal Rule of Criminal Procedure 16 sets out the requirements for discovery in federal criminal cases. State criminal procedure rules may vary depending on the jurisdiction.
In general, the prosecution in a felony case is required to disclose to the defense any evidence or information that is material to the case. This includes witness statements, police reports, crime scene images, forensic reports, expert witness reports, and other documents. This is known as “disclosure” or “discovery” by the prosecution. The prosecutor must also disclose exculpatory evidence.
The criminal defense attorney is also required to disclose to the prosecution any evidence or information that they plan to use at trial. This also includes witness lists, expert reports, and other documents. This is known as “reciprocal discovery” or “reciprocal disclosure” by the defense. However, attorney work product is protected and not subject to disclosure.