OPINION
Before HUFSTEDLER and CHOY, Circuit Judges, and REAL,* District Judge.
Montecalvo appeals from his conviction for bank robbery. Only one of the three issues on appeal requires discussion: Did the district court violate Rule 32(c)(1) of the Federal Rules of Criminal Procedure by reading, prior to Montecalvo’s conviction, material presented by the probation service to assist the court in sentencing?
On the afternoon of Montecalvo’s arrest, he appeared before a federal magistrate and indicated that he wanted to waive indictment and enter a guilty plea. His lawyer promptly asked the probation and parole office to collect any material that it had about Montecalvo and to present the file to the district judge. The office complied, and, on the same afternoon gave the court a file containing records of Montecalvo’s prior convictions, his prison records, *1111and some information relating to the offense with which he was charged. The file was not formally denominated a presentence report.
When Montecalvo appeared before the district court the following morning, he entered a guilty plea, but during his Rule 11 interrogation, he withdrew his plea, and the court vacated it. The district judge to whom the file had been delivered and who conducted the Rule 11 interrogation presided over the ensuing jury trial that ended with Montecalvo’s conviction.
Rule 32(c)(1) then provided:
“The probation service of the court shall make a presentence investigation and report to the court before the imposition of sentence or the granting of probation unless the court otherwise directs. The report shall not be submitted to the court or its contents disclosed to anyone unless the defendant has pleaded guilty or has been found guilty.”1
Gregg v. United States (1969) 394 U.S. 489, 89 S.Ct. 1134, 22 L.Ed.2d 442, teaches strict adherence to Rule 32(c)(1):
“Rule 32 is explicit. It asserts that the ‘report shall not be submitted to the court . unless the defendant has pleaded guilty or has been found guilty.’ This language clearly permits the preparation of a presentence report before guilty plea or conviction but it is equally clear that the report must not, under any circumstances, be ‘submitted to the court’ before the defendant pleads guilty or is convicted. Submission of the report to the court before that point constitutes error of the clearest kind.
“Moreover, the rule must not be taken lightly. Presentence reports are documents which the rule does not make available to the defendant as a matter of right. There are no formal limitations on their contents, and they may rest on hearsay and contain information bearing no relation whatever to the crime with which the defendant is charged. To permit the ex parte introduction of this sort of material to the judge who will pronounce the defendant’s guilt or innocence or who will preside over a jury trial would seriously contravene the rule’s purpose of preventing possible prejudice from premature submission of the presentenee report. No trial judge, therefore, should examine the report while the jury is deliberating since he may be called upon to give further instructions or answer inquiries from the jury, in which event there would be the possibility of prejudice which Rule 32 intended to avoid. Although the judge may have that information at his disposal in order to give a defendant a sentence suited to his particular character and potential for rehabilitation, there is no reason for him to see the document until the occasion to sentence arises, and under the rule he must not do so.”
(394 U.S. at 491-92, 89 S.Ct. at 1136, 22 L.Ed.2d at 446; footnote omitted.)
Following Gregg, we held that a violation of Rule 32 is per se reversible error. (United States v. Park (9th Cir. 1975) 521 F.2d 1381.)
The district judge had read Montecalvo’s file before the abortive plea hearing.2
*1112The Government contends that Montecalvo’s file is not within Rule 32(c)(1) because it was a “parole file” rather than a “presentence report,” relying on the fact that the file was not entitled “presentence report” and upon its reading of United States v. Duhart (9th Cir. 1974) 496 F.2d 941.
The label on the file has no significance. The content of the file is what counts. The purpose of Rule 32(c)(1) is to prevent, so far as possible, the injection into the guilt or innocence phase of the trial various kinds of information that would not be admissible as evidence to determine innocence or guilt and that could affect the fairness or the appearance of fairness of that determination. Rule 32(c)(1) is another example of the means that we use to try to avoid convicting or appearing to convict a defendant for being a bad person instead of convicting him solely for committing the crime with which he has been charged. The appearance of fairness is as important as fairness-in-fact in maintaining confidence in the administration of justice in the minds of the public and of the accused. Under Rule 32(c)(1), it is immaterial whether any judge can and has totally disregarded prejudicial information in a presentence report that he has read before the conclusion of the guilt phase of the trial. The Rule is a preventive device to avoid any appearance of unfairness.
The term “presentence report” as used in Rule 32(c)(1) is not a term of art. It is a shorthand expression intended to encompass any report that contains the kind of information described in Rule 32(c)(2),3 designed to help the judge in sentencing and excluded from the guilt determination phase of the case by reason of its unreliability or, regardless of its reliability, by reason of public policy considerations deemed of greater moment than a determination of a particular defendant’s guilt. It is not possible, even if it were desirable, to prevent the judge who tries the case from obtaining a lot of information about a defendant that would routinely appear in a presentence report but that could not be brought to a jury’s attention. For instance, information about a defendant’s family, his financial condition, his prior criminal record, and other details about his background are often necessarily disclosed in proceedings to fix bail and in other pretrial proceedings.
Rule 32(c)(1) should be construed both practicably and in keeping with its spirit. To these ends, we read “presentence report” in Rule 32(c)(1) to mean any report submitted to the judge who presides during the guilt phase of the trial that contains information of the kind generally described in Rule 32(c)(2) that was not properly disclosed during the course of trial or during any pretrial proceedings in the case.
Montecalvo’s file is a presentence report as thus defined. It contained his prior criminal record, his prison report with all its attendant data, and additional information *1113relating to the offense charged. None of this material had been disclosed during the abbreviated pretrial proceedings in this case.
Our definition of “presentence report” does not conflict with the holding in United States v. Duhart, supra, 496 F.2d 941, that the prison report there considered was not a presentence report within the meaning of Rule 32(c)(1). Duhart did not define “presentence report,” nor did it describe the contents of the prison report in question. The opinion does suggest that the information was of the kind-that should have been properly before the court for pretrial purposes. (496 F.2d at 946.) However, some of the broad language in the dicta gives sustenance to the Government’s argument that no document that is not labeled “presentence report” fits Rule 32(c)(1). We decline to support the dicta because if it were encouraged to flower, the beneficent purposes of Rule 32(c)(1) would be seriously impaired. The meaningless quality of labeling is illustrated by this case. The district judge called Montecalvo’s file a “file jacket.” The probation officer called it “file material.” The appellant’s lawyer called it “parole and probation officer’s records.” On appeal, the Government says it was a “parole file.”
The Government argues that Montecalvo cannot complain about the violation of Rule 32(e)(1) because he has shown no prejudice from the violation and because, through his attorney, he requested submission of the report to the judge in order to fulfill his then intent to plead guilty. The per se rule of United States v. Park, supra, 521 F.2d at 1383, n. 1, forecloses the first argument. The second requires discussion.
Nothing in the record suggests that Montecalvo intended to let the district judge read the presentence report if he was not then facing sentencing. True, the district judge cannot be faulted in preparing himself for a supposed immediate sentencing. But neither can Montecalvo be faulted or foreclosed when his anticipated guilty plea collapsed, and the judge who read the report thereafter presided over his trial. He cannot be charged with any waiver under these circumstances,4 and the elements of estoppel do not exist. The Government suffered no detriment caused by Montecalvo’s request. The detriment, if any, was caused by the aborted plea and by the failure thereafter to transfer the case for trial to another judge.5
REVERSED.