CUDAHY, Circuit Judge.
Joseph Waites, the student-manager of the Calumet High School football team in Chicago, was shot dead when he and other members of the football team got into a street scuffle with local gang members. A jury convicted Clarence Gardner of the first degree murder of Waites, and he was sentenced to 35 years in prison. Gardner, a self-professed gang member, was tried on a theory of accountability. At trial, the jury heard that, while Gardner neither fired the lethal shots nor supplied the gun, he punched and kicked Waites and exhorted other gang members to “bust him,” a colloquialism for “shoot him.” The prosecution’s theory was that Gardner was the leader on the street and “gave the orders to kill.” An Illinois appellate court affirmed Gardner’s conviction and the Illinois Supreme Court denied his petition for leave to appeal. Gardner petitioned for a writ of habeas corpus under 28 U.S.C. § 2254. The district court denied the relief sought and Gardner now appeals, contending that his trial was rendered fundamentally unfair by the trial court’s refusal (1) to grant a continuance to allow him to present his only fact witness, and (2) to thoroughly question prospective jurors about gang bias during voir dire. We find that the trial court acted unreasonably both in denying the continuance and in limiting voir dire. Because we believe that Gardner was denied his rights to due process and a fair trial, we reverse the decision of the district court and direct that the writ of habeas corpus shall issue unless the State affords Gardner a new trial within 120 days.
Standard of Review
A writ of habeas corpus may be issued only if the challenged decision of the state court “was contrary to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States,” 28 U.S.C. § 2254(d)(1) or “was based on an unreasonable determination of the facts in light of the evidence presented in the State court proceeding.” 28 U.S.C. § 2254(d)(2). For the purposes of habeas review, the state court’s factual findings are presumed to be correct; Gardner has the burden of rebutting the presumption of correctness by clear and convincing evidence. See 28 U.S.C. § 2254(e)(1). We review the state court’s legal determinations as well as mixed questions of law and fact de novo. See Long v. Krenke, 138 F.3d 1160, 1163 (7th Cir.1998).
Background
The facts of this case are set out at some length in the Illinois appellate court’s opinion affirming Gardner’s conviction. See People v. Gardner, 282 Ill.App.3d 209, 217 Ill.Dec. 940, 668 N.E.2d 125 (1996). Our discussion here is limited to the facts immediately pertinent to this appeal.
On the afternoon of October 23, 1993, a few blocks from Calumet High School, several members of the high school football team were involved in an altercation with a larger group comprising members of two allied gangs, the Gangster Disciples and the Black Disciples. Among the Gangster Disciples present at the scene was the defendant, Clarence Gardner, who was sixteen years old at the time. Also present [583]*583were two older men, Richard Taylor1 and Demitrius Smith, who had driven by in a blue car some time earlier in the afternoon. While there is some dispute over the facts — which may be explained in part by the chaos and confusion on the street that afternoon — we divine that events unfolded roughly as follows.
The incident was sparked by a series of verbal exchanges between individual football players and gang members. Gardner, who was standing in the crowd, allegedly asked the football players what they were doing and told two of them to remove their hats. During this bout of “trash-talking,” Smith and Taylor pulled up to the epicenter of the altercation in the blue car. The mélée intensified. Smith jumped out of the car and charged the football players, igniting a fullblown confrontation involving at least 50 youths. The football players fled the scene and a chase ensued. Joseph Waites — who was not a member of any gang — was grabbed by about six gang members and beaten to the ground where he was punched and kicked. In a court-reported statement given during a police interview, Gardner admitted that he participated in the beating by punching Waites three times in the chest. When the beating had ceased, Taylor appeared from the direction of the car, gun in hand, and told the others to move because he was “fixing to bust him.” Another gang member, Buck Eye Lee, then said “take care of your business” and, by his own admission, Gardner said “bust him.” Taylor pointed the gun at Waites and Gardner heard four shots as he ran from the scene.
Three of the football players testified at trial: Michael Waites, the victim’s brother, Anthony Foster and Cantrell Davis. Each testified that he knew Gardner at the time and that Gardner went by the nickname “Ceno.” Michael Waites testified that when the blue car pulled up to the epicenter of the altercation, Gardner said “bust them folks” and that he repeated the words “bust" him” three times more. Anthony Foster testified that after the driver and passenger got out of the car, Gardner told them that the football players were members of a rival gang and said “bust at then-ass.” Cantrell Davis confirmed the gist of Foster’s testimony but testified- that he heard Gardner say “fuck that folks shoot them, pop at them, bust at them, bust at them.” However, on cross examination, Davis conceded that the speaker was outside his line of vision and that his identification of Gardner was based on voice recognition alone. Although Michael Waites, Anthony Foster and Cantrell Davis each spoke to the police on the day of the shooting, none of the three attributed the “bust” statements to Gardner at that time; it was only in subsequent police interviews that Gardner was named. In fact, on the day of the shooting each of the three stated that they believed the speaker to have been a Black Disciple, whereas at trial they testified that they had known that Gardner was a Gangster Disciple.
In his court-reported statement, Gardner admitted that he said “bust him” in the final stage of the altercation before Taylor fired the fatal shots. Whether these words were a leader’s orders into action or the mere echoing cry of a foot soldier after the evil deed was virtually done was a defining issue at trial. The prosecution’s case — that Gardner was “the chief’ on the street — depended heavily on its characterization of Gardner’s role during the initial stages of the altercation.2 The contention [584]*584that Gardner issued an order to kill rested in part on the notion that Gardner had been the one issuing orders during those initial stages. The defense, of course, attempted to cast Gardner as a hapless private in the ranks. It argued that precisely because Gardner had not been the guy in charge during the initial stages, his utterance of the words “bust him” in the final stage was not a leader’s order to kill but merely an excited exclamation — an echo of the shooter’s own words — albeit of a less than innocent bystander.
Continuance
The trial commenced on Wednesday, February 15, 1995. During voir dire, the trial judge advised prospective jurors that the trial might stretch over to the following Tuesday, February 21. The prosecution rested its case in the middle of the afternoon on Friday, February 17. The defense then presented one impeachment witness, a police officer who had taken statements from the prosecution’s eyewitnesses. Gardner did not testify in his own defense. At about 3:30 p.m., the defense informed the trial judge that it had one more witness, Luther Donald, a friend of the victim, who had promised to be in court that day but had gone to school instead. The defense moved for a continuance to the next court day — Tuesday, February 21, since Monday was a court holiday — in order to allow Donald to testify. When questioned about the content of Donald’s proposed testimony, the defense explained:
We expect him to say that he was present with other football players and that he saw this car come up with two people in it. And that he heard the words at that point bust him or shoot him. That it came from one of the people in the car neither of whom were seen. When he first talked to the police he did give them the name Ceno. He did not assign to that person those statements.
Tr. at 145. In other words, Donald would have testified that he heard someone in the car — presumably Smith and Taylor (and not Gardner who was never in the car)— say “bust him” at the moment when Michael Waites, Anthony Foster and Cantrell Davis allegedly heard Gardner utter those very words. In denying the request for a continuance, the trial judge stated:
Let the record reflect that it is now 3:35. It appears to me on Friday — Monday is a court holiday. Tuesday we are 4 judges short. We have five jury trials, 2 judges to do it, myself and Judge Erickson. That’s what is scheduled for Tuesday. It seems to me that this witness’s testimony is cumulative with everything else you have said he will say, including that somebody in the car said bust him. One of the witnesses — all the witnesses have said this person got out of the car, said he wanted to bust him or something to that effect. It’s already been said. And it’s also opinion. It’s also in the defendant’s statement. It seems to me leaving aside the fact I think given the current posture of the case, if it was just for one day tomorrow, that wouldn’t be so bad. I don’t want the jury out on this case for three days and coming in on the 4th especially in view of the Court’s schedule and in view of the fact that this is cumulative.
Tr. at 145-46. Gardner contends that the trial court committed constitutional error. He argues that the denial of his request for a continuance violated his Sixth Amendment right to present a defense and his Fourteenth Amendment rights to due process and a fair trial.
The right of a defendant to present witnesses is “the right to present a defense” and therefore “a fundamental ele[585]*585ment of due process of law.” Washington v. Texas, 388 U.S. 14, 19, 87 S.Ct. 1920, 18 L.Ed.2d 1019 (1967); see also Chambers v. Mississippi, 410 U.S. 284, 302, 93 S.Ct. 1038, 35 L.Ed.2d 297 (1973). However, the right is not absolute and must be balanced against other legitimate interests in the criminal trial process. See McMorris v. Israel, 643 F.2d 458, 460-61 (7th Cir.1981). Whether to grant a continuance traditionally lies within the discretion of the trial judge. See Ungar v. Sarafite, 376 U.S. 575, 589, 84 S.Ct. 841, 11 L.Ed.2d 921 (1964); United States, ex rel. Searcy v. Greer, 768 F.2d 906, 912-13 (7th Cir.1985).
When the request for a continuance is based on the unavailability of a witness, we have premised our review on four factors: “(1) whether due diligence has been exercised to obtain the attendance of the witnesses; (2) whether substantial favorable evidence would be tendered by the witness; (3) whether the witness is available and willing to testify; and (4) whether the denial of the continuance would materially prejudice the defendant.” Searcy, 768 F.2d at 913. At the same time, the Supreme Court has cautioned: “There are no mechanical tests for determining when a denial of a continuance is so arbitrary as to violate due process. The answer must be found in the circumstances present in every case, particularly in the reasons presented to the trial judge at the time the request is denied.” Ungar, 376 U.S. at 589, 84 S.Ct. 841. Our task then is to weigh the exculpatory significance of Donald’s testimony against the competing state interests that prevented Gardner from presenting this evidence at trial. See McMorris, 643 F.2d at 461. Gardner has the burden of demonstrating that the denial was fundamentally unfair and that “the resulting prejudice [is] such that had the continuance been granted, there is a reasonable probability that the verdict would have been different.” Padgett v. O'Sullivan, 65 F.3d 72, 75 (7th Cir.1995).
The trial court gave two reasons for denying the continuance: the court’s schedule and the cumulative nature of the proposed testimony. As between the two, the trial court seemed particularly preoccupied with the organization of its calendar. It is undisputed that the continuance would have necessitated stretching the trial over to the next court day. But according to defense estimates, Donald’s testimony would have taken no more than one and a half hours of trial time. It is likely, therefore, that the completion of the trial would have required at most a further half day of the court’s time. While the administration of the criminal docket is obviously important and is a major responsibility of the trial court, we think here that it is an inadequate justification for denying a reasonable request for a short continuance to present the only defense occurrence witness. In this instance, the potential prejudice to Gardner’s defense was immeasurable and clearly outweighed what was at worst a modest disturbance of the court’s calendar. In short, the trial court demonstrated “myopic insistence upon expeditiousness in the face of a justifiable request for delay.... ” Ungar, 376 U.S. at 589, 84 S.Ct. 841. Evidently our view is shared by the Illinois appellate court which expressed its “uneasiness with the trial court’s excessive concern about the next week’s schedule in the criminal court.” 217 Ill.Dec. 940, 668 N.E.2d at 130.
The trial court’s second rationale for the denial — that Donald’s testimony was cumulative — goes to the heart of this appeal. The Illinois appellate court recognized that Donald’s testimony “while cumulative to some degree, would have been of use to the defense.” 217 IlLDec. 940, 668 N.E.2d at 130. But, ultimately, the appellate court could not say that the proposed testimony was material or that its absence prejudiced Gardner’s right to a fair trial. We agree that Donald would have helped Gardner’s cause at trial and we are strongly impressed by the importance of his evidence. Our reading of the record suggests [586]*586that Donald’s testimony could have been more than beneficial; insofar as it substantiated Gardner’s version of events — and challenged the prosecution’s theory of the case — Donald’s testimony could have proved decisive. See Searcy, 768 F.2d at 913.
Three distinct references to the use of the term “bust him” were introduced into evidence at trial: (1) the prosecution’s eyewitness testimony that Gardner spoke the phrase during the initial stages of the altercation; (2) Taylor’s direction to other gang members to move out of the way because he was “fixing to bust him;” and (3) Gardner’s admission in his court-reported statement that he had said “bust him” in the final stage of the altercation. Donald would have testified that when the blue car pulled up to the epicenter of the altercation he heard the words “bust him” come from someone in the car. Gardner, of course, was not in the car. Thus, Donald would have testified about a fourth distinct statement clearly attributable to someone other than Gardner during the initial stages of the altercation.
Since the football players fled the scene before the shooting, the defense maintains that the testimony of Michael Waites, Anthony Foster and Cantrell Davis — that they heard Gardner say “bust him” or words to similar effect — relates only to those initial stages. Donald would also have addressed what was said during that time and, in so doing, he would have challenged their version of events. In particular, he would have contradicted their testimony that it was Gardner who said “bust him” when the car pulled up. In constructing Gardner’s alleged leadership role, the prosecution placed great store on its eyewitness testimony. Donald’s ability to contradict that version of events was particularly significant because of the inconsistencies (noted above) between the original police statements and the trial testimony of Michael Waites, Anthony Foster and Cantrell Davis. At the very least, Donald’s testimony would have cast a shadow of doubt over their identification of Gardner as the speaker.
We have noted that the prosecution’s theory of the case relied heavily on Gardner’s alleged leadership role during the initial stages of the altercation. By imputing the statement “bust him” to someone other than Gardner within that window of time, Donald would have undermined the prosecution’s theory that Gardner was the “chief,” the Disciple calling the shots on the street that afternoon.3 Specifically, Donald would have pointed the finger at Smith and Taylor, two older men, who had a direct hand in the death of Waites. Smith drove the car, supplied the gun and instigated the physical assault; Taylor declared that he was “fixing to bust” Waites and fired the fatal shots. Indeed, it was the arrival of these men at the scene that signaled the transformation of an episode of “trash-talking” into a violent assault and killing. In the circumstances, it is entirely plausible that Smith and/or Taylor — rather than Gardner — were orchestrating events and giving orders. Donald’s testimony would have substantiated that view. Moreover, by deconstructing Gardner’s alleged leadership role, Donald would have implicitly bolstered the defense’s claim that Gardner’s “bust him” in the final stage of the altercation was not a leader’s order but instead a foot soldier’s exclamation in the heat of battle.4
[587]*587We fail to see how Donald’s testimony could be regarded as cumulative. Donald would have provided important evidence, new to the trial, that never reached the jury. Insofar as it would have raised questions about the timing of the so-called “orders to Mil” as well as the identity of the speaker it would have been both fresh and material (certainly not cumulative). To the extent that Donald would have shed light on who said what and, particularly, when, we believe that his testimony was material to the jury’s determination of the defining issue whether Gardner was leader or foot soldier — -whether his was a “voice” or merely an echo.5
Whether the prosecution’s evidence was “still more than adequate” to support Gardner’s conviction — notwithstanding anything Donald might have said — is sharply disputed. Padgett, 65 F.3d at 75. During oral argument, the State described as “inconceivable” the notion that Gardner would have been acquitted on the basis of Donald’s testimony. But we do not share the State’s confidence in the strength of its evidence. Donald was Gardner’s only fact witness and, as a friend of the victim, his testimony could have carried particular weight with the jury. We are not saying — nor is it necessary to say — that the jury would have been swayed by the dé-fense at the end of the day. We are saying that the defense was entitled to tell its story and that Donald was an essential character in that tale. To put it another way, the jury was entitled to consider the evidence regardless of whether ultimately it might have chosen to accept or reject it. See Enoch, 768 F.2d at 163. The bottom line: this was a close case and Donald’s testimony may well have been enough to create at least a reasonable doubt in the mind of the jury.
The State argues that, in any event, Donald’s testimony was not essential since Gardner could have been convicted for murder on an accountability theory as a mere accomplice. The Illinois appellate court was persuaded by this argument. See 217 IlLDec. 940, 668 N.E.2d at 130. But while we defer to the appellate court’s explanation of Illinois’s accountability theory, we take the view that what the prosecution could have argued on another day is beside the point. The prosecution here went to trial on the theory that Gardner [588]*588was the leader who issued the order to kill; the jury was not asked to convict Gardner for merely emboldening Taylor in the shooting of Waites.
Finally, the State argues that defense counsel was less than diligent in securing the appearance of Donald in court and points out that there was no evidence that Donald would have been available and willing to testify on the next court day. But in giving his reasons for refusing the continuance, the trial judge cited neither a lack of diligence on the part of defense counsel nor a concern over Donald’s availability and willingness to testify. The State concedes that the absence of a subpoena in the record does not in itself justify the denial of a continuance, but argues, nonetheless, that this deficiency demonstrates a lack of diligence.6 While the defense may be faulted for not securing a subpoena, we do not consider this a fatal oversight. And we see no firm basis for believing that Donald would not appear on the next court day.
For all of these reasons, we believe that the trial court constitutionally erred in refusing to grant Gardner’s request for a continuance and that he is therefore entitled to a writ of habeas corpus.
Voir Dire
The Sixth Amendment right to an impartial jury guarantees an adequate voir dire to identify unqualified jurors and to provide sufficient information to enable the defense to raise peremptory challenges. See Morgan v. Illinois, 504 U.S. 719, 729, 112 S.Ct. 2222, 119 L.Ed.2d 492 (1992); Rosales-Lopez v. United States, 451 U.S. 182, 188, 101 S.Ct. 1629, 68 L.Ed.2d 22 (1981); United States v. Lewin, 467 F.2d 1132 (7th Cir.1972). The Constitution “does not dictate a catechism for voir dire,” Morgan, 504 U.S. at 729, 112 S.Ct. 2222, and there is no right to have particular questions asked. See Ham v. South Carolina, 409 U.S. 524, 528-29, 93 S.Ct. 848, 35 L.Ed.2d 46 (1973). Provided that the minimum mandates of the Sixth Amendment are satisfied, the trial court has broad discretion in determining what questions may be asked. See United States v. McAnderson, 914 F.2d 934, 942-43 (7th Cir.1990).
In the present case, Gardner contends that the trial court abused its discretion by refusing to allow sufficient questioning to uncover potential gang bias. Having unsuccessfully moved to exclude all gang-evidence from the case, the defense submitted five questions — designed to elicit gang bias — for the court to pose to potential jurors during voir dire:
(1) Have you or any member of your immediate family ever had any direct involvement with a street gang?
(2) Do you think that someone who is in a gang is necessarily a criminal?
(3) Do you understand that it is not a crime just to join a gang?
(4) Do you understand that one member of a gang is not legally responsible for the actions of other gang members just because they are in the same gang?
(5) Would you be able to put aside any feelings you may have about gangs, and give the defendant a fair trial based on the evidence?
[589]*589The trial court agreed to pose the first question and offered to follow-up if any of the prospective jurors responded in the affirmative. Moreover, during the course of voir dire, the court asked about any indirect involvement that the jurors or any family members might have had with street gangs. The trial court refused to pose the remaining questions, however, or to allow the defense to pose them in its stead.
The conduct of voir dire in gang cases presents particular challenges. Our society takes a very dim and undiscriminating view of street gangs. That jurors may automatically see in gang membership the taint of criminality is a real concern. The Illinois courts have recognized that evidence of gang association may have an unduly suggestive and distorting effect on a jury. See People v. Cruz, 164 Ill.App.3d 802, 115 Ill.Dec. 795, 518 N.E.2d 320, 327 (1987) (“... in Chicago, as in every other large metropolitan area, ‘there is a deep, bitter and widespread prejudice against street gangs.’ ”) (quoting People v. Parrott, 40 Ill.App.3d 328, 352 N.E.2d 299, 302 (1976)). Moreover, an Illinois appellate court has held that a trial court’s failure during voir dire to ask any questions that would probe for gang bias amounts to reversible error. See People v. Jimenez, 284 Ill.App.3d 908, 220 Ill.Dec. 97, 672 N.E.2d 914, 917 (1996).
We have previously recognized the importance of thorough voir dire in the context of gang trials. In McAnderson, the defendants were muslims and members of the El Rukns, a predominantly black Chicago street gang, who were convicted of involvement in a conspiracy to commit terrorist acts. The defendants challenged the adequacy of voir dire, contending that the district court should have asked more pointed questions in probing for racial and religious bias (rather than gang bias specifically). We refused to reverse what we deemed to be a careful and detailed voir dire process, noting that the district court had asked questions not only about the defendants’ race, religion and ethnic background but also about the jurors’ knowledge of the El Rukns. See 914 F.2d at 943.
In the present case, the persona of the street gang ran like a thread through the fabric of the trial. From the first sally of opening argument, through the various stages of the trial, the prosecution emphasized the case’s immersion in gang lore. The jury was told about Gardner’s membership in the Gangster Disciples, his association with other gang members on the day of the shooting, the provocative “trash-talking” of the gang members, the gang-motivated confrontation with the football players, and ultimately, the gang-beating and gang-shooting of Waites. The prosecution hammered the theme home in rebuttal argument on closing:
This case is about the stupidity of street gangs in Chicago. You have seen first hand why this country looks at Chicago with such disgust and disdain. It’s because of GDs, because of folks just like this seated right here.
Some-people have asked what can we do about this senseless violence, about these innocent victims that will die. There was an innocent victim in this case. He did nothing, nothing, nothing deserving to die. My God, we have to do something about that. Well today as jurors you have the rare privilege of being in a position to actually do something about the gang violence in Chicago.
Tr. at 181. Given the prosecution’s emphasis on gangs as central to the case and the powerful bias against membership in gangs, identifying gang bias among prospective jurors was essential to an adequate voir dire — all the more so since Gardner was to be tried on an accountability theory. The prospective jurors were asked only whether they or any member of their immediate family had ever had any involvement — direct or indirect — with street gangs. This strikes us as an unduly narrow approach. The potential for juror [590]*590bias is by no means limited to direct or indirect involvement with street gangs. Like any other form of prejudice, gang bias may be born of perception as much as personal experience. Most potential jurors in Illinois (and their families) may have had no direct or indirect involvement with street gangs but many of them would probably hold opinions on the subject. In the circumstances, we believe that some questions directed to juror perception of and predisposition towards gangs would have been appropriate. An adequate inquiry should include (but need not be limited to) questions that confirm the ability of prospective jurors to put aside any such feelings and decide the case on the basis of the evidence presented.
We recognize that the trial court need not recite a litany of questions during voir dire — including the particular questions requested by the defense. But the court should undertake some minimal inquiry into matters that may have a bearing on bias. Thus, we cannot share the view of the Illinois appellate court that the questions posed by the trial court here were sufficient to create a reasonable guarantee that any bias would be discovered. See 217 IlLDec. 940, 668 N.E.2d at 131. And given the narrowness of the trial court’s inquiry, the offer of follow-up on any positive response was essentially meaningless. This was not an instance where the trial court undertook “a lengthy and detailed” voir dire in probing for gang prejudice and merely refrained from asking “certain questions thought by the defense to be better than the ones used.” McAnderson, 914 F.2d at 943 (internal quotation and citation omitted).7 Clearly something more was required here in order to meet “the essential demands of fairness.” Morgan, 504 U.S. at 730, 112 S.Ct. 2222. In the circumstances, we believe that the trial court’s questioning was insufficient to assure Gardner the adequate voir dire to which he is constitutionally entitled.8
We find that the trial court’s decisions to deny the continuance and to limit voir dire were “contrary to, or involved an unreasonable application of, clearly established Federal law_” 28 U.S.C. § 2254(d)(1). Thus, we REVERSE the decision of the district court and REMAND with the direction that the writ of habeas corpus shall issue unless the State affords Gardner a new trial within 120 days.