Brady v. Maryland, 373 U.S. 83, 87, 10 L. Ed. 2d 215, 83 S. Ct. 1194; Napue v. Illinois, 360 U.S. 264, 269, 3 L. Ed. 2d 1217, 79 S. Ct. 1173; People v. Wolff, 19 Ill.2d 318, 323.
In the Brady case, the United States Supreme Court held that the suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment ; and in the Giles case, the concurring opinion emphasized the constitutional dimensions of withholding police reports helpful to the defense, stating: “Nondisclosure— deliberate withholding — of important information of the type described [police reports], which is in the exclusive possession of the State is, in my judgment, not reconcilable with the concept of a fair trial and with the Due Process Clause.”
In the Napue case the United States Supreme Court held that there was a violation of due process where the State, although not soliciting false evidence, allowed it to go uncorrected, where it relates to the credibility of a witness.
This court also recognized the constitutional implications of such nondisclosure in the Wolff case at page 327 where we commented that “ ‘the commands of the Constitution were close to the surface’ of the decision in the lencks case,”* which promulgated the rule requiring the production of favorable evidence in the possession of the prosecution.
When the rulings of the trial court here are measured by the analyses of law set forth in those cases, it is evident that even though defendant was given access to the police reports, by preventing defense counsel from effectively using such reports to impeach the officer’s testimony identifying defendant on direct examination, the court violated not only Illinois criminal procedural law, but the constitutional doctrine of due process of law.