Opinion of the Court

480 U. S. law provides that the information shall be disclosed in certain circumstances, including when CYS is directed to do so by court order. Pa. Stat. Ann., Title 11, §2215(a)(5) (Purdon Supp. 1986). Given that the Pennsylvania Legislature contemplated some use of CYS records in judicial proceedings, we cannot conclude that the statute prevents all disclosure in criminal prosecutions. In the absence of any apparent state policy to the contrary, we therefore have no reason to believe that relevant information would not be disclosed when a court of competent jurisdiction determines that the information is "material" to the defense of the accused.

We therefore affirm the decision of the Pennsylvania Supreme Court to the extent it orders a remand for further proceedings. Ritchie is entitled to have the CYS file reviewed by the trial court to determine whether it contains information that probably would have changed the outcome of his trial. If it does, he must be given a new trial. If the records maintained by CYS contain no such information, or if the nondisclosure was harmless beyond a reasonable doubt, the lower court will be free to reinstate the prior conviction. 15

15 The Commonwealth also argues that Ritchie is not entitled to disclosure because he did not make a particularized showing of what information he was seeking or how it would be material. See Brief for Petitioner 18 (quoting United States v. Agurs, 427 U. S. 97, 109–110 (1976) (“The mere possibility that an item of undisclosed information might have helped the defense... does not establish 'materiality' in the constitutional sense")). Ritchie, of course, may not require the trial court to search through the CYS file without first establishing a basis for his claim that it contains material evidence. See United States v. Valenzuela-Bernal, 458 U. S. 858, 867 (1982) (“He must at least make some plausible showing of how their testimony would have been both material and favorable to his defense"). Although the obligation to disclose exculpatory material does not depend on the presence of a specific request, we note that the degree of specificity of Ritchie's request may have a bearing on the trial court's assessment on remand of the materiality of the nondisclosure. See United States v. Bagley, 473 U. S. 667, 682-683 (1985) (opinion of BLACKMUN, J.).

This ruling does not end our analysis, because the Pennsylvania Supreme Court did more than simply remand. It also held that defense counsel must be allowed to examine all of the confidential information, both relevant and irrelevant, and present arguments in favor of disclosure. The court apparently concluded that whenever a defendant alleges that protected evidence might be material, the appropriate method of assessing this claim is to grant full access to the disputed information, regardless of the State's interest in confidentiality. We cannot agree.

A defendant's right to discover exculpatory evidence does not include the unsupervised authority to search through the Commonwealth's files. See United States v. Bagley, supra, at 675; United States v. Agurs, supra, at 111. Although the eye of an advocate may be helpful to a defendant in ferreting out information, Dennis v. United States, 384 U. S. 855, 875 (1966), this Court has never held-even in the absence of a statute restricting disclosure-that a defendant alone may make the determination as to the materiality of the information. Settled practice is to the contrary. In the typical case where a defendant makes only a general request for exculpatory material under Brady v. Maryland, 373 U. S. 83 (1963), it is the State that decides which information must be disclosed. Unless defense counsel becomes aware that other exculpatory evidence was withheld and brings it to the court's attention, the prosecutor's decision on disclosure is final. Defense counsel has no constitutional right to conduct his own search of the State's files to argue relevance. See Weatherford v. Bursey, 429 U. S. 545, 559 (1977) (“There

16 See Fed. Rule Crim. Proc. 16(d)(2); Pa. Rule Crim. Proc. 305(E) (“If at any time during the course of the proceedings it is brought to the attention of the court that a party has failed to comply with this rule [mandating disclosure of exculpatory evidence], the court may... enter such... order as it deems just under the circumstances").

is no general constitutional right to discovery in a criminal case, and Brady did not create one”).

We find that Ritchie's interest (as well as that of the Commonwealth) in ensuring a fair trial can be protected fully by requiring that the CYS files be submitted only to the trial court for in camera review. Although this rule denies Ritchie the benefits of an "advocate's eye," we note that the trial court's discretion is not unbounded. If a defendant is aware of specific information contained in the file (e. g., the medical report), he is free to request it directly from the court, and argue in favor of its materiality. Moreover, the duty to disclose is ongoing; information that may be deemed immaterial upon original examination may become important as the proceedings progress, and the court would be obligated to release information material to the fairness of the trial.

To allow full disclosure to defense counsel in this type of case would sacrifice unnecessarily the Commonwealth's compelling interest in protecting its child-abuse information. If the CYS records were made available to defendants, even through counsel, it could have a seriously adverse effect on Pennsylvania's efforts to uncover and treat abuse. Child abuse is one of the most difficult crimes to detect and prosecute, in large part because there often are no witnesses except the victim. A child's feelings of vulnerability and guilt and his or her unwillingness to come forward are particularly acute when the abuser is a parent. It therefore is essential that the child have a state-designated person to whom he may turn, and to do so with the assurance of confidentiality. Relatives and neighbors who suspect abuse also will be more willing to come forward if they know that their identities will be protected. Recognizing this, the Commonwealth-like all other States "-has made a commendable effort to assure vic

17 The importance of the public interest at issue in this case is evidenced by the fact that all 50 States and the District of Columbia have statutes that protect the confidentiality of their official records concerning child abuse. See Brief for State of California ex rel. John K. Van de Kamp et al.

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Opinion of BLACKMUN, J.

tims and witnesses that they may speak to the CYS counselors without fear of general disclosure. The Commonwealth's purpose would be frustrated if this confidential material had to be disclosed upon demand to a defendant charged with criminal child abuse, simply because a trial court may not recognize exculpatory evidence. Neither precedent nor common sense requires such a result.

IV

We agree that Ritchie is entitled to know whether the CYS file contains information that may have changed the outcome of his trial had it been disclosed. Thus we agree that a remand is necessary. We disagree with the decision of the Pennsylvania Supreme Court to the extent that it allows defense counsel access to the CYS file. An in camera review by the trial court will serve Ritchie's interest without destroying the Commonwealth's need to protect the confidentiality of those involved in child-abuse investigations. The judgment of the Pennsylvania Supreme Court is affirmed in part and reversed in part, and the case is remanded for further proceedings not inconsistent with this opinion.

It is so ordered.

JUSTICE BLACKMUN, concurring in part and concurring in the judgment.

I join Parts I, II, III-B, III-C, and IV of the Court's opinion. I write separately, however, because I do not accept the plurality's conclusion, as expressed in Part III-A of JUSTICE POWELL's opinion, that the Confrontation Clause protects only a defendant's trial rights and has no relevance to pretrial discovery. In this, I am in substantial agreement with much of what JUSTICE BRENNAN says, post, in dissent. In my view, there might well be a confrontation violation

as Amici Curiae 12, n. 1 (listing illustrative statutes). See also Besharov, The Legal Aspects of Reporting Known and Suspected Child Abuse and Neglect, 23 Vill. L. Rev. 458, 508-512 (1978).

Opinion of BLACKMUN, J.

480 U. S.

if, as here, a defendant is denied pretrial access to information that would make possible effective cross-examination of a crucial prosecution witness.

The plurality recognizes that the Confrontation Clause confers upon a defendant a right to conduct cross-examination. Ante, at 51. It believes that this right is satisfied so long as defense counsel can question a witness on any proper subject of cross-examination. For the plurality, the existence of a confrontation violation turns on whether counsel has the opportunity to conduct such questioning; the plurality in effect dismisses-or, at best, downplays-any inquiry into the effectiveness of the cross-examination. Ante, at 51-52. Thus, the plurality confidently can state that the Confrontation Clause creates nothing more than a trial right. Ante, at 52.

If I were to accept the plurality's effort to divorce confrontation analysis from any examination into the effectiveness of cross-examination, I believe that in some situations the confrontation right would become an empty formality. As even the plurality seems to recognize, see ante, at 51-52, one of the primary purposes of cross-examination is to call into question a witness' credibility. This purpose is often met when defense counsel can demonstrate that the witness is biased or cannot clearly remember the events crucial to the testimony. The opportunity the Confrontation Clause gives a defendant's attorney to pursue any proper avenue of questioning a witness makes little sense set apart from the goals of cross-examination.

There are cases, perhaps most of them, where simple questioning of a witness will satisfy the purposes of crossexamination. Delaware v. Fensterer, 474 U. S. 15 (1985) (per curiam) is one such example. There the Court rejected a Confrontation Clause challenge brought on the ground that an expert witness for the prosecution could not remember the method by which he had determined that some hair of the victim, whom Fensterer was accused of killing, had been