Illinois Statutes Chapter 725. Criminal Procedure § 5/115-22. Witness inducements

(1) whether the witness has received or been promised anything, including pay, immunity from prosecution, leniency in prosecution, or personal advantage, in exchange for testimony;

(2) any other case in which the witness testified or offered statements against an individual but was not called, and whether the statements were admitted in the case, and whether the witness received any deal, promise, inducement, or benefit in exchange for that testimony or statement; provided that the existence of such testimony can be ascertained through reasonable inquiry;

(3) whether the witness has ever changed his or her testimony;

(4) the criminal history of the witness; and

(5) any other evidence relevant to the credibility of the witness.