In January 1969, after a jury trial in Monroe County Court, Rochester, New York, Alton Cannon was convicted of the first degree rape of Shirley Rippel. He was given an indeterminate sentence of six years and eight months to 20 years in prison. On appeal, the case was remanded by the Appellate Division to the trial court for further proceedings to determine if appellant had waived his right to counsel at a lineup. People v. Cannon, 33 A.D.2d 641, 305 N.Y.S.2d 106 (4th Dep’t 1969). Waiver having been found,1 the Appellate Division affirmed the conviction without opinion, People v. Cannon, 33 A.D.2d 1104, 309 N.Y.S.2d 894 (4th Dep’t 1970), and the New York Court of Appeals denied review.
Subsequently, appellant twice petitioned the United States District Court for the Western District of New York for a writ of habeas corpus. He now appeals from orders of Chief Judge John O. Henderson and Judge Harold P. Burke denying the applications without a hearing.2 For reasons stated below, we remand to the district court for further proceedings in accordance with this opinion.
I
Appellant first contends that the state court erroneously permitted the prosecution to refer to a suppressed typewritten confession and indirectly reveal its contents. The issue arose in the following context: Five days after the rape of Mrs. Rippel, the police picked up appellant for questioning. At a Huntley hearing shortly before trial, Detective Mahoney testified as follows: From 8:30 to 8:45 A.M., Cannon made oral admissions concerning both the Rippel incident and unrelated attacks on Marilyn Stevens and Rose Sprague. At 8:45 A. M., the police took a question and answer statement transcribed by a stenographer, which we will call the stenographic statement, relating to the Stevens case. At 9:15 A.M., a typewritten statement was prepared concerning the Sprague complaint, and signed by Cannon. Between 9:40 and 10:00 A.M., a typewritten statement was made dealing with the rape of Shirley Rippel, and was signed.
Because the stenographic statement showed that Cannon twice requested a lawyer before making it, the trial judge suppressed that statement and the later two signed statements as well. However, the judge refused to bar evidence of Cannon’s earlier oral admissions3 made before any request for counsel. The “cut-off” point was 8:45 A.M., the time when the stenographic statement was started.
*265At the trial, Detective Funk, who had not been called at the Huntley hearing, corroborated Detective Mahoney. (The latter also testified, in substance repeating his earlier account given at the Huntley proceeding.) On cross-examination, appellant’s counsel sought to impeach Detective Funk by reading from his testimony at a preliminary hearing where he had stated that Cannon was first questioned on the Rippel case at 9:30 A.M., 45 minutes after the crucial cut-off time. Detective Funk affirmed the accuracy of the preliminary hearing version and said: “That was the first statement we took in regards to this [Rippel] incident.” On redirect, the officer testified that the word “statement” referred to a signed typewritten statement and that an oral statement had been obtained at 8:30 A.M. The prosecutor then showed the signed statement to Detective Funk. After various remarks identifying it (to which appellant’s counsel took a continuing objection) , the following colloquy ensued:
Q. And in sum or substance does that document relate what the defendant previously told you orally ?
A. [Detective Funk] Yes sir, it is.
Appellant’s primary argument is directed to this exchange. According to him, even if reference to the suppressed typewritten statement can be justified as an attempt to rehabilitate Detective Funk (a point he does not concede), the “sum or substance” comment clearly exceeded this purpose and permitted the jury to consider the statement’s contents in violation of due process. Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966). Furthermore, appellant contends, the judge enhanced the prejudicial effect by allowing the jury to hear the detectives’ testimony again4 and by refusing to charge that the jurors should ignore the typewritten statement and anything connected with it.
The judge, however, did give a limiting instruction. A few hours after the jurors retired, they returned and asked the court whether they could consider the typewritten statement as evidence. The judge responded as follows:
Reference was made to [the statement] on one or more occasions, that one was typed, where it was typed and some of the circumstances concerning it.
Now these references are testimony and may be considered by you. However, the statement itself was never introduced into evidence, and therefore you may not consider it as evidence.
The jury again retired and several hours afterward returned a verdict of guilty.
Appellant argues that the sequence of events recited above resulted in reversible constitutional error. However we might feel if these were the only relevant facts before us, another portion of the trial record is crucially important. Appellant took the stand in his own defense and denied that he had ever attacked, or even seen, Mrs. Rippel or that he had orally admitted committing the rape. In cross-examination, the prosecution tried to use the suppressed statement to impeach defendant’s credibility, but the trial judge barred this tactic. The trial antedated the decision of the Supreme Court in Harris v. New York, 401 U.S. 222, 91 S.Ct. 643, 28 L.Ed.2d 1 (1971), which held that a Miranda-violative statement could be used to impeach the accused’s credibility, so long as it had not been coerced and a limiting instruction was given. See also Walder v. United States, 347 U.S. 62, 74 S.Ct. 354, 98 L.Ed. 503 (1954) (impeachment on collateral matter).
With the 20-20 hindsight afforded by Harris, we now know that the prosecutor, with the requisite foundation, could properly have utilized the typewritten statement under an instruction that the *266jury could consider it on credibility alone.5 Cf. United States v. Briggs, 457 F.2d 908 (2d Cir.1972), cert, denied, 409 U.S. 986, 93 S.Ct. 337, 34 L.Ed.2d 251 (1973). Here the prosecutor’s, witness testified only obliquely to the contents of the writing by stating that in “sum or substance” the typed statement incorporated the earlier oral admissions. Furthermore, the judge charged the jury, in effect, that it could not consider the statement itself as evidence on any issue. Cf. United States v. Kahan, 479 F.2d 290 (2d Cir. 1973) (no limiting instruction). Although the prosecutor should not, in his case in chief, have placed before the jury even indirectly the substance of the statement, the mistake would have had no independent significance had the trial judge allowed the prosecutor proper latitude in cross-examination. Nonetheless, appellant urges this court to reject the implications of Harris because of the chance that “appellant would not have taken the stand if the existence and contents of the typewritten statement had not been revealed to the jury. . . .” The present circumstances, however, render this possibility very remote. Given the verbal admissions, which were properly before the jury,6 and the lack of direct reference to the matter in the People’s closing argument, the “sum or substance” remark could have added only marginal strength to the prosecution’s ease. We are persuaded beyond a reasonable doubt that this evidence was not a substantial factor in inducing appellant to testify, and that therefore its admission did not prejudice Cannon by unreasonably burdening his right to remain silent. Cf. Griffin v. California, 380 U.S. 609, 85 S.Ct. 1229, 14 L.Ed.2d 106 (1965).
In addition, it is worth noting that the jurors showed every indication of being thoughtful and receptive to the court’s guidance. No less than four times, the jurors returned to the courtroom to seek further enlightenment. On one of these occasions, as indicated, they asked for instructions regarding the appropriate use of the very statement in issue. Therefore, one may realistically assume that the jury obeyed the judge’s charge — a charge that, in light of Harris, was overly favorable to appellant — and declined to consider the substance of the statement as evidence. On these facts, we decline to rule that appellant was denied due process.
II
Appellant further contends that he was denied due process by Mrs. Rippel’s identification of him at trial and by admission of evidence of her prior lineup identification. Specifically, he claims that the lineup was unduly suggestive and violated the fourteenth amendment. Stovall v. Denno, 388 U.S. 293, 87 S.Ct. 1967, 18 L.Ed.2d 1199 (1967); see also Foster v. California, 394 U.S. 440, 89 S. Ct. 1127, 22 L.Ed.2d 402 (1969). At a Wade hearing held just before trial, appellant testified that Lieutenant Reiss, who picked him up at home in the early morning five days after the rape, told him to wear a green sweater.7 He did so, and later that morning at a lineup was named by Mrs. Rippel as her assailant. This fact assumes significance because of the Lieutenant’s prior testimony given at the Huntley hearing. There, he stated that before picking up appellant, he had read the complaints of the women in the three cases in which he suspected Cannon, noted that in two of the incidents the attacker wore a green shirt and further recalled that Cannon had on a similar garment at the time of their initial meeting earlier that day.
The victim testified at the Wade hearing that she had viewed appellant at a *267lineup and selected him from among five Negro males. By the time of the hearing, she could not recollect what the others had worn; she did, however, remember that appellant — like her attacker— had been wearing a green shirt. In addition, her testimony at trial revealed that she had never seen her assailant’s face. (Mrs. Rippel’s observations were understandably limited since she was assaulted at night on the street, grabbed from behind and raped with her skirt held over her head.)
Detective Mahoney, too, gave evidence at the Wade hearing. He was the only one to describe the other men in the lineup in relationship to Cannon. According to the officer:
They were all of within an inch or two or approximately the same height and approximately the same in weight. And one or two approximately the same in dress. (Emphasis added.)
Detective Mahoney did not, however, testify — indeed, he was never asked — about the color of the clothing of the other men in the lineup or whether any of them wore green.
In confrontations of this kind, the Supreme Court has held that due process is violated whenever an identification device is “so impermissibly suggestive as to give rise to a very substantial likelihood of irreparable misidentification.” 8 Simmons v. United States, 390 U.S. 377, 384, 88 S.Ct. 967, 971, 19 L.Ed.2d 1247 (1968). The test is extremely general, and in each case one must examine the totality of circumstances to determine whether the challenged procedure infringed constitutional rights. See, e. g., Neil v. Biggers, 409 U.S. 188, 93 S.Ct. 375, 34 L.Ed.2d 401 (1972); Stovall v. Denno, 388 U.S. 293, 87 S.Ct. 1967, 18 L.Ed.2d 1199 (1967); United States ex rel. Gonzalez v. Zelker, 477 F.2d 797 (2d Cir. 1973).
Assuming arguendo that appellant was the only man in the lineup wearing a green shirt, we might well be disposed to hold that the identification method was impermissibly suggestive. See Foster v. California, 394 U.S. 440, 443, 89 S.Ct. 1127, 22 L.Ed.2d 402 (1969) (among other things, defendant only man in “leather jacket similar to that worn by the robber”). But cf. United States ex rel. Anderson v. Mancusi, 413 F.2d 1012, 1014 (2d Cir. 1969) (defendant’s red shirt “stood out like a neon sign”). This conclusion would be fortified by the indication of police complicity in arranging an unfair lineup. Cf. United States ex rel. Gonzalez v. Zelker, supra, 477 F.2d at 803.
However, even a finding of unnecessary suggestiveness need not require the exclusion of identification evidence. One must then assess the likelihood of misidentification by weighing such external factors as
the opportunity of the witness to view the criminal at the time of the crime, the witness’ degree of attention, the accuracy of the witness’ prior description of the criminal, the level of certainty demonstrated by the witness at the confrontation, and the length of time between the crime and the confrontation.
Neil v. Biggers, 409 U.S. 188, 199, 93 S. Ct. 375, 34 L.Ed.2d 401 (1972).
At the end of the Wade hearing, the state judge held that the lineup was constitutionally valid. He therefore denied appellant’s motion to suppress Mrs. Rip-pel’s lineup and in-court identifications. We are commanded to accord great weight to the findings of the state trial judge, 28 U.S.C. § 2254(d), “who saw and heard the witnesses,” United States ex rel. Phipps v. Follette, 428 F.2d 912, 915 (2d Cir. 1970). Cf. United States ex rel. Miller v. LaVallee, 436 F.2d 875, 876-877 (2d Cir. 1970). As noted previously, however, the Wade hearing did not elicit any comparative evidence on the colors worn by the other men at the *268lineup. If all were dressed in green the inference of undue suggestion would clearly fail. If one or two had on green shirts, the inference would .weaken very considerably. On the other hand, if the inference remained, it would acquire great importance in a case where the victim’s “opportunity ... to view the criminal at the time of the crime” was limited, as appears to be the case here. Neil v. Biggers, supra, 409 U.S. at 199, 93 S.Ct. at 382.
Apparently, neither the state trial court nor the federal district court focused on this aspect of appellant’s claims. Moreover, as already indicated, the record on a significant factual question is sparse. Under these circumstances, we decline to decide the ultimate issue of taint. Because “the material facts were not adequately developed at the State court hearing,” 28 U.S.C. § 2254(d)(3), we remand to the district court to conduct a further Wade hearing, taking into account the factors which we have cited, or, in the alternative, to hold the case in abeyance so as to allow the state tribunal to oversee such proceedings.
Ill
Appellant raises two additional points in his brief. He challenges the state court’s finding at the Huntley hearing that, as to the oral admissions, appellant voluntarily and knowingly waived his Miranda rights. On this issue, however, appellant had a full and fair hearing on the facts. The trial judge determined the matter adversely to him on the merits. We see no reason to substitute our judgment for his and, therefore, hold that the oral statements were properly received in evidence.
Finally, appellant contends that his conviction in the absence of any admissible evidence violated his right to-due process. Thompson v. Louisville, 362 U.S. 199, 80 S.Ct. 624, 4 L.Ed.2d 654 (1960). Under New York law, the complaining witness’ testimony in sexual offense cases must be corroborated by other evidence tending to prove the crime. N.Y.Pen.L. § 130.15 (McKinney’s Consol. Laws, c. 40 Supp.1972). Here, Mrs. Rip-pel’s account at trial was bolstered by appellant’s oral admissions which, as we have held, were properly before the jury. Accordingly, there is no such failure of evidence as would invalidate appellant’s conviction under the Thompson rationale.9
Case remanded for further proceedings consistent with this opinion. We commend Frederick A. Provorny, as appointed counsel, for his splendid representation of appellant.
. People v. Cannon, 61 Misc.2d 171, 305 N. Y.S.2d 108 (Monroe Cy. Ct. 1969).
. Appellant filed his first petition in November 1970. Chief Judge Henderson denied it, without prejudice to renewal upon a showing of exhaustion of state remedies. Thereafter, Cannon filed a certificate of the New York Court of Appeals declining review of his case; in June 1972, Judge Henderson denied the petition on the merits. Appellant submitted his second application for relief in October 1972. In February 1973, Judge Burke refused to issue the writ on the ground that Cannon’s petition was the same as the one already denied.
. Appellant also disputes the failure to strike these oral admissions. This issue is discussed below.
. After several hours of deliberation, the jury returned to the court and asked to hear for a second time the entire testimony of Detectives Mahoney and Funk. The request was granted.
. Neither side originally made any argument based upon Harris, but we called the point to the attention of the parties, and asked for, and received, post-argument briefs on the issue.
. At tlie trial, appellant reiterated this evidence with the added fact that he had originally been getting ready to put on a different sweater. On cross-examination, Lieutenant Reiss corroborated the story.
. See part III infra.
. See also Stovall v. Denno, 388 U.S. 293, 302, 87 S.Ct. 1967, 18 L.Ed.2d 1199 (1967), barring confrontations that are “unnecessarily suggestive and conducive to irreparable mistaken identification.”
. Of course, if a new Wade hearing should invalidate the lineup and in-court identifications, a problem of insufficient evidence— though not necessarily one of due process dimensions—might conceivably arise. N.Y. C.P.L. § 60.50 (McKinney’s Consol.Laws, c. 11-A, 1971) (necessity for corroboration, of confession).