The petitioner-appellant, Frank J. Ruiz, appeals from the denial of his petition for a writ of habeas corpus. As the sole ground for relief, Ruiz asserts that he was denied due process when the prosecutor failed to disclose "that the state's primary witness, Thomas Garcia, was given assurance that he would not be likely to be sentenced to prison in an unrelated case if he testified against (Ruiz)." On appeal, two issues are presented: (1) whether the district court erred in denying habeas relief without examining the entire state court record; and (2) if not, whether the decision on the merits of Ruiz' claim was correct. However, because we find that the district court improperly relied upon the state appellate court's determination of the crucial issue presented, we need not decide the latter issue. Instead, we vacate the district court's judgment and remand for further proceedings.

On October 31, 1974, after a jury trial in Branch 5 of the Racine County Court, Racine, Wisconsin, Ruiz was convicted of first-degree murder and immediately sentenced to a mandatory term of life imprisonment which he currently is serving in the Wisconsin State Reformatory in Green Bay. After a hearing on January 22, 1975, Ruiz' post-verdict motions for a new trial were denied by the trial court. Shortly after the decision of United States v. Agurs, 427 U.S. 97, 96 S. Ct. 2392, 49 L. Ed. 2d 342 (1976), Ruiz' conviction was affirmed without oral argument by the Wisconsin Supreme Court. With respect to the claim urged on habeas corpus, it held that Ruiz was not denied due process because of the prosecutor's failure to disclose the existence of the assurances given to Garcia. Ruiz v. State, 75 Wis. 2d 230, 249 N.W.2d 277 (1977).

On March 30, 1978, Ruiz filed the instant petition for a writ of habeas corpus. As set forth above, the sole ground for relief asserted was that the prosecutor withheld exculpatory evidence.1 However, Ruiz admitted that the undisclosed evidence was not requested. To his return to the petition Cady annexed, inter alia: (1) transcripts of hearings related to the trial court's issuance of bench warrants to secure the attendance at trial of several prosecution witnesses, including Garcia, who had failed to appear on the original trial date despite a subpoena ordering him to do so; (2) the transcript of the hearing on Ruiz' post-verdict motions for a new trial; (3) both sides' state appellate briefs; and (4) the opinion of the Wisconsin Supreme Court. The district court was informed that transcripts of the arraignment, trial and sentencing proceedings were available upon request. However, the record does not indicate that these were requested or received by the court. Applying Agurs, the district court denied the petition without a hearing, finding that the agreement with Garcia did not raise a reasonable doubt about guilt. The basis for this conclusion, which is the primary subject of the parties' dispute, was that "Mr. Garcia's testimony at trial was substantially consistent with his testimony at Mr. Ruiz' preliminary hearing which took place before the agreement between the two prosecutors. Ruiz v. State, 75 Wis. 2d 230, 238 (249 N.W.2d 277) (1977)."

Whether the prosecutor's failure to disclose the existence of the agreement with Garcia violated Ruiz' right to due process depends solely upon the materiality of the agreement. Brady v. Maryland, 373 U.S. 83, 87, 83 S. Ct. 1194, 1196, 10 L. Ed. 2d 215 (1963). Generally, where, as here, no request for the evidence was made, to give rise to a due process violation the undisclosed evidence must create "a reasonable doubt about guilt" which would not exist otherwise. United States v. Agurs, 427 U.S. at 112-13, 96 S.Ct. at 2401-02. However, in cases such as this, in which the undisclosed evidence is useful only for impeachment, the Fifth Circuit employs the arguably stricter standard applicable to the disposition of motions under Fed.R.Crim.P. 33, see Garrison v. Maggio, 540 F.2d 1271, 1273-74 (5th Cir. 1976), cert. denied, 431 U.S. 940, 97 S. Ct. 2655, 53 L. Ed. 2d 258 (1977) ("probably would have resulted in an acquittal"), while the Third Circuit retains the Agurs standard. See United States v. McCrane, 547 F.2d 204 (3d Cir. 1976) (per curiam) (on remand for reconsideration in the light of Agurs). Not only is McCrane more consistent with Agurs than is Garrison, compare, e. g., Agurs, 427 U.S. at 111, 96 S.Ct. at 2401, with McCrane, 547 F.2d at 205-06,2 but the difference between the Rule 33 and Agurs standards may be chimerical, even though the two are contrasted both in Agurs and Garrison, because evidence which "raises a reasonable doubt about guilt" (the Agurs standard) should result in an acquittal. Consequently, the district court correctly concluded that the Agurs standard applied.

In this case, however, formulating the applicable standard is not as important as recognizing "that the omission must be evaluated in the context of the entire record (because) if the verdict is already of questionable validity, additional evidence of relatively minor importance might be sufficient to create a reasonable doubt." Agurs, 427 U.S. at 113-14, 96 S.Ct. at 2402 (footnote omitted). Thus, when "Brady" claims such as Ruiz' are raised, an examination of the entire record is required. See, e. g., United States v. Weidman, 572 F.2d 1199 (7th Cir.), cert. denied, 439 U.S. 821 (1978); United States v. Disston, 582 F.2d 1108 (7th Cir. 1978), appeal after remand, 612 F.2d 1035 (7th Cir. 1980).

Such an examination is essential to a proper disposition of this case in which the dispute between the parties is reduced to a debate concerning the degree of variation between Garcia's testimony at the preliminary hearing and at trial.3 The Wisconsin Supreme Court determined that Garcia's testimony was substantially consistent, as follows:

There was a minor discrepancy between the testimony of Garcia at the preliminary examination and at trial. At the preliminary, Garcia, who was at the other end of the bar from Ruiz and his victim, stated that he had not been observing the patrons at the other end of the bar and only turned around when he heard the breaking of bottles, and it was then he saw Ruiz strike Cisneroz with a knife. At trial Garcia said he had been watching, and he saw the defendant stab Cisneroz before he fell against the bar and broke the bottles. In other respects the testimony at the preliminary and at the trial was substantially the same. Garcia did not equivocate in respect to the facts of the stabbing. He never claimed to have seen a fight.

75 Wis.2d at 233, 249 N.W.2d 277.

Without examining the entire state court record, the district court adopted this determination. Pursuant to the analysis utilized in Agurs, which requires that the undisclosed evidence be evaluated in light of the entire record, this mode of disposition was erroneous, most obviously because the district court should have determined for itself the extent to which Garcia's testimony was consistent. Also, without examining the trial transcript the district court could not adequately assess other possible exculpatory effects of the undisclosed evidence. For example, depending upon the extent to which Garcia's testimony was impeached otherwise, the undisclosed evidence might have been either cumulative or fatal to the prosecution's case. Similarly, the exculpatory value of impeaching Garcia's testimony may depend upon the extent to which Ruiz' trial testimony was shaken.

Cady argues that the Wisconsin Supreme Court's determination that Garcia's testimony was consistent is a factual determination and, therefore, is presumptively correct under 28 U.S.C. § 2254(d).4 He maintains, therefore, that the district court's failure to examine the state court record was not erroneous. He argues further that the state court determination was not contested by Ruiz below, thereby abrogating any obligation which the district court otherwise would have had to review the entire record. Ruiz maintains that the state court determination was contested sufficiently. Insofar as both parties characterize the Wisconsin Supreme Court's determination as factual, they miss the mark completely.5

Pursuant to the analysis set forth in Davis v. Heyd, 479 F.2d 446 (5th Cir. 1973), § 2254(d) is inapplicable to the Wisconsin Supreme Court's determination. In Davis a state prisoner who had been convicted of manslaughter unsuccessfully petitioned the district court for a writ of habeas corpus. He claimed that the prosecutor failed to disclose exculpatory evidence which consisted, inter alia, of written statements taken from witnesses shortly after the incident from which the charges arose. The petitioner claimed that the shooting, which he admitted having committed, was accidental. He argued that the undisclosed statements supported his theory of the case while the witnesses' trial testimony did not. The state appellate court had rejected this same claim because it found no substantial inconsistencies between the witnesses' written statements and their trial testimony, thereby rendering the undisclosed evidence immaterial. The district court denied relief on alternative grounds, the first of which was that the state appellate court's consistency determination was presumptively correct under § 2254(d). The Court of Appeals reversed. It held that the consistency determination, like the materiality determination, was a legal one to which the § 2254(d) presumption was inapplicable. The court reasoned as follows:

(B)oth questions are inextricably intertwined with each other ... (T)he facts vel non are not in dispute. We know what the statements said, and we know what the witnesses said at trial. The initial task is only to compare the transcribed content of the (witnesses') trial testimony with the transcribed content of their out-of-court statements and then to determine if they are inconsistent. The issue is not factual under any traditional definition of the term "fact". Its resolution does not require proof instead of argument; it does not involve reconstruction of historical facts; it does not require a finding as to the intent of the witnesses who signed the statements; nor does it require credibility choices based on the demeanors of the witnesses.

479 F.2d at 451.

Recent Supreme Court precedent also supports our conclusion that the Wisconsin Supreme Court's determination was not presumptively correct under § 2254(d). In Cuyler v. Sullivan, 446 U.S. 335, 100 S. Ct. 1708, 64 L. Ed. 2d 333 (1980), a state prisoner petitioned for a writ of habeas corpus claiming ineffective assistance of counsel because of multiple representation. Two privately retained attorneys participated in the three separate trials of the petitioner and his two co-defendants. Contrary to a magistrate's finding, the district court concluded that there had been no multiple representation, accepting the determination of the state appellate court. 100 S. Ct. at 1713. The Third Circuit rejected this determination and reversed. It held that the two attorneys' participation in the three trials established multiple representation as a matter of law. Id. In the Supreme Court, the State argued that under § 2254(d) the state court determination was presumptively correct and, therefore, that the Court of Appeals had exceeded the proper scope of review. The Court rejected these arguments. It found that the determination of whether there had been multiple representation, upon which resolution of the ultimate question of whether the petitioner had been deprived of the effective assistance of counsel turned, was a "mixed determination of law and fact that requires the application of legal principles to the historical facts ...." 100 S. Ct. at 1715 (citations omitted). Consequently, the Court held that the Court of Appeals had not exceeded the proper scope of review. So too in this case, the consistency determination requires the application of legal principles to historical facts. Such "mixed" questions must be determined independently by a federal habeas court. Brown v. Allen, 344 U.S. 443, 507, 73 S. Ct. 397, 446, 97 L. Ed. 469 (1953) (Frankfurter, J., concurring).

In summary, whether characterized as a purely legal determination as in Davis, or as a mixed determination of law and fact as in Cuyler, the consistency determination in this case should have been made independently by the district court on the basis of the entire record.6

For these reasons, the district court's judgment is vacated and the case remanded for further proceedings consistent with this opinion.

VACATED and REMANDED.