Discovery is a legal term that describes a legal requirement to give a defendant all the information that prosecutors hold so that the defendant can prepare a suitable defense. This normally comes after the arrest of a criminal defendant but before trial. Discovery is usually triggered by a defense motion during pretrial motions.
CBS News is reporting that Senator Chuck Grassley has a whistleblower with information that then Vice President Biden sold himself to a foreign national in a scheme involving a payoff in exchange for policy decisions.
In their letter to Wray and Attorney General Merrick Garland, Grassley and Comer said that it had come to their attention that "the Department of Justice (DOJ) and the Federal Bureau of Investigation (FBI) possess an unclassified FD-1023 form that describes an alleged criminal scheme involving then-Vice President Biden and a foreign national relating to the exchange of money for policy decisions."
Why go public with this now? It seems to me, as a retired investigator, that you would want to get your hands on the document before you let people know that it even exists. Why give Discovery at this early stage? I admit that I am a bit baffled about why this news is coming out at this time.