LUCERO, Circuit Judge.
Stephen Moore was convicted in 1988 by a Colorado jury of first-degree assault, a crime of violence for stabbing, and one count of felony menacing for wielding a gun. He was sentenced to twenty-six years in prison. After exhausting his state court remedies, he sought habeas corpus relief in federal district court. The district court denied his request for habeas relief and also denied his request for a certificate of probable cause. Our jurisdiction is premised on 28 U.S.C. § 1291 and 28
U.S.C. § 2253. Although we grant Moore’s request for a certificate of appeal-ability (“COA”) on all issues,
we affirm the district court’s denial of his request for habeas relief.
I
On July 4, 1987, Moore, accompanied by James Klevenz, went to the apartment of a friend and sometime employer, Kenneth Goudie, seeking $150 Goudie owed him. When Moore arrived, he found Goudie on his couch — Goudie had spent the entire night before drinking and playing cards. Moore came armed with a cane, a knife, and a gun, allegedly because he feared Goudie’s temper.
Not surprisingly, the visit by the well-armed creditor to the intoxicated debtor soon took a violent turn. At trial, Moore admitted he began the scuffle, which later ended in Goudie’s stabbing, by beating Goudie with the cane. Goudie managed to grab the cane from Moore and then beat Moore with the cane, breaking Moore’s glasses and knocking Moore to his knees. While on his knees Moore stabbed Goudie in the chest, puncturing his lung and causing him to suffer cardiac arrest. After stabbing Goudie, Moore pointed a gun at him and demanded his money, pursuant to which Goudie gave him $200.
The sole factual dispute at trial was whether Moore stabbed Goudie in self-defense. Moore claimed that after he began beating Goudie with the cane, there was a break in the action. He alleged that Klevenz broke up the initial fight and then Goudie attacked him.
Moore raises three arguments in support of his appeal. First, he argues he was denied effective assistance of counsel at trial because his counsel failed to impeach Goudie with a prior inconsistent statement and failed to obtain testimony from two potential witnesses. Second, he alleges the state committed a
Brady
violation when it did not disclose that Goudie, the key witness for the prosecution, had applied for and received victim compensation payments. Finally, Moore asserts his Confrontation Clause rights were violated by the limits the state court placed on his ability to cross-examine Goudie.
II
A. Standard of Review
Appellant asserts that the Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”) does not apply to his appeal because his original habeas corpus petition was filed before the effective date of the Act; appellees do not appear to disagree with that assertion. In
Slack v. McDaniel,
529 U.S. 473, 481-82, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000), however, the Supreme Court clearly rejected appellant’s position and held that post-AEDPA law governs the right to appeal in any case where the notice of appeal was filed after the effective date of AEDPA.
See also English v. Cody,
241 F.3d 1279, 1281 (10th Cir.2001);
Tillman v. Cook,
215 F.3d 1116, 1120-21 (10th Cir.2000).
Appellees’ failure to object to appellant’s argued-for standard of review is understandable. As the Court concluded in
Slack,
AEDPA codifies the pre-AEDPA certificate of probable cause standard an
nounced in
Barefoot v. Estelle,
463 U.S. 880, 103 S.Ct. 3383, 77 L.Ed.2d 1090 (1983), with the exception that AEDPA’s requirement for the right to appeal is a “substantial showing of the denial of a constitutional right,” 28 U.S.C. § 2253(c)(2), while the pre-AEDPA requirement was a “substantial showing of the denial of a federal right.”
Slack,
529 U.S. at 483-84, 120 S.Ct. 1595. In
Tillman
we reviewed the Court’s ruling in
Slack
and determined that although it “may have some effect on non-constitutional claims” raised in petitions for habeas corpus, it does not change the standard for reviewing constitutional claims.
Tillman,
215 F.3d at 1120. The standard for reviewing a habeas petitioner’s right to appeal announced in
Barefoot
is as follows:
[P]etitioner need not show that he should prevail on the merits. He has already failed in that endeavor. Rather, he must demonstrate that the issues are debatable among jurists of reason; that a court could resolve the issues [in a different manner]; or that the questions are adequate to deserve encouragement to proceed further.
463 U.S. at 883 n. 4, 103 S.Ct. 3383 (citations and internal quotations omitted). We will grant habeas relief only if petitioner shows the alleged state court error “ ‘deprived him of fundamental rights guaranteed by the Constitution of the United States.’ ”
Tillman,
215 F.3d at 1121 (quoting
Brown v. Shanks,
185 F.3d 1122, 1124 (10th Cir.1999)).
To clear up any future confusion in cases where a petition for habeas corpus was filed with the district court prior to AED-PA and the notice of appeal was filed with this Court after AEDPA, we note that
Slack
overrules our prior precedent holding that AEDPA did not apply in such situations.
See, e.g., Rodgers v. Wyo. Att’y Gen.,
205 F.3d 1201, 1202 n. 1 (10th Cir.2000);
Fowler v. Ward,
200 F.3d 1302, 1307 (10th Cir.2000).
Although AEDPA clearly governs Moore’s right to appeal in this case, pre-AEDPA law governs our review of petitioner’s claims.
See English,
241 F.3d at 1281;
Tillman,
215 F.3d at 1121. We review legal issues de novo and the federal district court’s findings of fact for clear error.
Tillman,
215 F.3d at 1121. Under pre-AEDPA law, any findings of fact made by the state courts are entitled to a presumption of correctness.
Id.; see also
28 U.S.C. § 2254(d) (1994).
B. Effective Assistance of Counsel
Moore claims his trial counsel was ineffective because he failed to impeach Goudie with a prior inconsistent statement and because he failed to obtain the testimony of two potential witnesses for trial. Moore’s ineffective assistance of counsel claim is a mixed question of law and fact that we review de novo.
Sellers v. Ward,
135 F.3d 1333, 1344 (10th Cir.1998).
The test for establishing constitutionally ineffective assistance of counsel is twofold. Petitioner must demonstrate that his counsel’s performance fell below an objective standard of reasonableness and that counsel’s substandard performance prejudiced his defense.
Strickland v. Washington,
466 U.S. 668, 687, 688, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). To meet the first prong, petitioner must demonstrate that the omissions of his counsel fell “outside the wide range of professionally competent assistance.”
Id.
at 690,104 S.Ct. 2052. This standard is “highly demanding.”
Kimmelman v. Morrison, 477
U.S. 365, 382, 106 S.Ct. 2574, 91 L.Ed.2d 305 (1986). Strategic or tactical decisions on the part of counsel are presumed correct,
Strickland,
466 U.S. at 689, 104 S.Ct. 2052, unless they were “completely unreasonable, not merely wrong, so that [they] bear no relationship to a possible defense strategy,”
Fox v. Ward,
200 F.3d 1286, 1296 (10th Cir.2000) (quotation and cita
tions omitted) (alteration in
Fox
). To prevail on the second, prejudice prong, petitioner “must show there is a reasonable probability that, but for Ms counsel’s unprofessional errors, the result of the proceeding would have been different.”
Strickland,
466 U.S. at 694, 104 S.Ct. 2052. This, in turn, requires the court to focus on “the question whether counsel’s deficient performance rendered] the result of the trial unreliable or the proceeding fundamentally unfair.”
Lockhart v. Frdwell,
506 U.S. 364, 372, 113 S.Ct. 838, 122 L.Ed.2d 180 (1993).
1. Failure to Impeach
During the prosecution’s direct examination, Goudie admitted he had been drinking all night before his encounter with Moore and had not gone to sleep until 10 a.m. on July 4. He also testified he had not been using any drugs, aside from alcohol, nor had anybody else at the party. He reiterated this during cross-examination, asserting further that he did not use drugs as a general matter. Although Moore’s counsel had access to Goudie’s medical records, counsel did not attempt to impeach Goudie by cross-examining him on his admission to hospital personnel the day of the stabbing that he had been drinking and had “snorted coke.”
(II R.O.A., IV State R. Def.’s ex. 23 at 3.)
Moore argues his Sixth Amendment right to effective assistance of counsel was violated by his trial counsel’s failure to impeach Goudie, the prosecution’s key witness. If counsel had cross-examined Gou-die on the basis of his prior inconsistent statement in his medical record, Moore argues, counsel could have destroyed Gou-die’s credibility with the jury. Since the trial’s outcome depended on the jury’s assessment of Goudie’s word against Moore’s concerning the allegation that Moore acted in self-defense, the argument continues, counsel’s failure to impeach Goudie, or even to attempt to do so, was ineffective as well as prejudicial.
In order to assess Moore’s ineffective assistance of counsel claim, we briefly review the evidence presented at trial. It is uncontroverted that Moore came over to Goudie’s house bearing three weapons: a gun, a knife, and a cane. It is further uncontested that Moore beat Goudie with the cane, stabbed him with the knife, and pointed the gun at him.
At trial Moore’s credibility was called into doubt by the introduction of his two prior felony convictions, one of which occurred within a year of the trial and involved assault of a police officer. Importantly, Goudie’s story that he was attacked by Moore was strongly supported by the testimony of his neighbors, one of whom did not even know Goudie prior to the incident. Conversely, Moore’s story was not supported by any of the witnesses. For instance, Moore testified he was forced out the door of Goudie’s apartment as Goudie beat him, he was then pushed up against the railing of the building, and finally he had no choice but to stab Goudie. Goudie’s neighbor and acquaintance, Michael Hartford, testified that he saw Moore advancing on Goudie while Goudie screamed “Don’t come near me anymore. Don’t come near me any
more.” (II R.O.A., XII State R. at 152.) He also testified that Goudie was trying to keep Moore away as Moore tried to stab him with the knife. Another neighbor, Richard DeBarris, who did not know Gou-die until the incident, testified that he saw Moore stab Goudie as the two backed out of the apartment, and that Goudie was backed up by Moore’s approaches, not vice versa.
Although counsel’s failure to impeach a key prosecution witness is potentially the kind of representation that falls “outside the wide range of professionally competent assistance,”
Strickland,
466 U.S. at 690, 104 S.Ct. 2052, we need not examine that issue because we hold Moore has failed to demonstrate prejudice from his counsel’s omissions and thus has failed to establish he was denied effective assistance of counsel,
id.
at 697, 104 S.Ct. 2052 (“If it is easier to dispose of an ineffectiveness claim on the ground of lack of sufficient prejudice ... that course should be followed.”). Our review of the trial transcript shows that overwhelming evidence against Moore was presented at trial, even absent Goudie’s testimony. In addition, Goudie testified that he had been drinking heavily not long before the fight ensued.
Accordingly, even if Goudie had been impeached we cannot conclude that the outcome would have been different. As Moore’s trial counsel stated:
This was never a great case from the beginning unfortunately.... You look at it, break it down to the bottom line facts. You’ve got a man [Moore] who is going to testify with two prior felony convictions who’s going over armed with a cane, a gun and a knife, admits to the police and admits on the stand that he began the argument, began the fight, stabbed the victim, and then claims self defense. With all due respect to Mr. Moore, that’s a hard story to sell to a jury.
(II R.O.A., VII State R. at 86-87.)
2. Failure to Obtain Testimony from Marta Musich
Moore also asserts that his counsel was ineffective because he failed to obtain the testimony of Marta Musich. She allegedly would have testified to Goudie’s reputation for violence, thus justifying Moore’s need to go to Goudie’s house armed and supporting his claim that he acted in self-defense.
We conclude that counsel’s failure to obtain Musich’s testimony, even if completely unreasonable,
did not prejudice Moore’s defense. Although Moore was the only person to testify directly as to Goudie’s recent violent history, the prosecution did not try to contradict Moore’s assertion.
Whether or not Goudie was a violent man with a history of attacking oth
ers, the facts at trial clearly established that Moore hit Goudie first and eventually stabbed him. Additional evidence of Gou-die’s violent character would have done nothing to refute the uncontroverted fact that Moore used the three weapons he carried with him against Goudie. Nor would such evidence mitigate Moore’s admission that he carried the knife with him as a general matter.
Finally, evidence of Goudie’s violent temper could do nothing to mitigate the evidence of Moore’s own history of violence, in particular his admission at trial that when he loses his temper he hurts people.
3. Failure to Obtain Testimony from James Klevenz
We also affirm the district court’s denial of Moore’s ineffective assistance of counsel claim premised on the failure of his counsel to obtain the testimony of James Klevenz. Klevenz allegedly would have testified that he broke up the first fight between Goudie and Moore by inserting himself in the middle and that the stabbing resulted from a second fight, initiated by Goudie, and was an act of self-defense.
In state post-conviction proceedings, Moore testified he told his trial counsel that Klevenz was likely either in New Jersey or Pennsylvania. Klevenz, however, testified he never left Colorado. Moore’s trial counsel enlisted the aid of an investigator to attempt to find Klevenz, and the investigator made continued efforts to try to locate him. Klevenz, however, testified he did not want to be found and actively avoided service.
Not only did he avoid
service of a subpoena by Moore, but he avoided service by the prosecution, who also would have liked him to testify.
The state court held an evidentiary hearing on the effectiveness of Moore’s counsel, and we owe that court’s findings of fact a presumption of correctness. 28 U.S.C. § 2254(d) (1994). The court found that Moore, against the advice of counsel, refused to ask for a continuance and to waive his right to speedy trial. Counsel advised Moore that a continuance would allow him to make additional efforts to locate Musich and Klevenz and would also give him further time to prepare. The trial court found counsel’s testimony at the hearing credible concerning Moore’s own strategic error, namely his estimate that the prosecution would not be able to prepare for trial within the speedy trial period. Accordingly, the court concluded that Moore’s failure “to follow counsel’s advice in obtaining a continuance of the trial was the sole contributing factor in defense counsel’s inability to locate and present witnesses.”
Colorado v. Moore,
No. 87 CR 903, slip op. at 11 (Adams County, Colo. Dist. Ct. Dec. 11,1991).
In this appeal, Moore argues that because the state court did not make a factual finding concerning whether Klevenz could have been located before trial, the federal court should have held an eviden-tiary healing on that issue. He attempts to argue that the state public defender’s lack of knowledge concerning what the investigator did to try to locate Klevenz precludes a finding that reasonable efforts were made.
We conclude that the hypothetical ability to locate Klevenz before trial is not conclusive with regard to Moore’s counsel’s effectiveness. To be entitled to an evidentiary hearing, Moore would have to “make allegations which, if proved, would entitle him to relief.”
Stouffer v. Reynolds,
168 F.3d 1155, 1168 (10th Cir.1999) (quotation omitted). Even if he proved Klevenz could have been found, he would not be entitled to relief because, as the district court concluded, “defense counsel’s efforts were reasonable.” (I R.O.A. Doc. 50 at 5.) Klevenz actively avoided service, Moore gave his counsel incorrect information regarding Klevenz’s whereabouts, Moore refused to waive his speedy trial right in order to give counsel additional time to locate Klevenz despite counsel’s advice, and counsel employed a professional investigator to find Klevenz. Evaluating “[t]he reasonableness of counsel’s performance ... from counsel’s perspective at the time of the alleged error and in light of all the circumstances,”
Kimmelman,
477 U.S. at 381, 106 S.Ct. 2574, we simply can not conclude counsel’s performance fell “outside the wide range of professionally competent assistance,”
Strickland,
466 U.S. at 690, 104 S.Ct. 2052. Accordingly, we need not reach the prejudice prong of the ineffective assistance of counsel test, and we affirm the district court’s denial of Moore’s Sixth Amendment claims.
C.
Brady
Violation
Moore’s next claim is a matter of first impression in this Court. He asserts the prosecution committed a
Brady
violation by failing to disclose that Goudie had applied for and received victim compensation payments.
Under
Brady v. Maryland,
373 U.S. 83, 87, 83 S.Ct. 1194, 10 L.Ed.2d 215 (1963), the prosecution violates a defendant’s due process rights when it fails to disclose evidence favorable to the defendant that was material either to guilt or punishment. The
Brady
rule is applicable where the suppressed evidence was impeachment evidence.
United States v. Bagley,
473 U.S. 667, 676, 105 S.Ct. 3375, 87 L.Ed.2d 481 (1985). Evidence is material if there is a reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different.
Id.
at 682, 105 S.Ct. 3375. A “reasonable probability” is a “probability sufficient to undermine confidence in the outcome” of the case.
Id.
“ ‘The question is not whether the defendant would more likely than not have received a different verdict with the evidence, but whether in its absence he received a fair trial, understood as a trial resulting in a verdict worthy of confidence.’ ”
Moore v. Gibson,
195 F.3d 1152, 1165 (10th Cir.1999) (quoting
Kyles v. Whitley,
514 U.S. 419, 434, 115 S.Ct. 1555, 131 L.Ed.2d 490 (1995)). Whether the allegedly suppressed evidence was material is a mixed question of law and fact that we review de novo.
Id.
Prior to trial, Goudie applied for just under $10,000 in victim compensation payments under Colorado law.
See
Colorado Crime Victim Compensation Act, Colo.Rev. Stat. §§ 24-4.1-100.1 to -304. He also applied for, and received, a $500 emergency payment. The program administering such payments was run with the help of the district attorney’s office.
Before this Court, Moore argues that the potential to receive victim compensation payments gave Goudie a “powerful incentive to paint himself as the ‘victim’ ” (Appellant’s Br. at 42); i.e., Goudie had a $10,000 interest in testifying that Moore attacked him and that Moore did not act in self-defense.
See
Colo. Rev. Stat § 24-4.1-108(1) (entitling crime victims to compensation). According to Moore, introduction of Goudie’s monetary interest in testifying would have affected his credibility to the jury.
Goudie’s application for victim compensation payments and application for and receipt of emergency victim compensation payments may well have been “favorable” within the meaning of
Brady.
Because Goudie’s receipt of such payments depended on a finding by the Crime Victim Compensation Board that he did not substantially provoke Moore in the course of the altercation, introduction at trial of the fact of the application would have demonstrated that Goudie had a financial interest in painting himself as the “victim.”
See id.
§ 24-4.1-108(l)(e) (disallowing compensation if the victim’s injuries are “substantially attributable to his wrongful act or substantial provocation of his assailant”). Additionally, introduction of Goudie’s application for emergency payments could have supported an assertion that Goudie
was in dire financial straits and thus had a greater incentive to vilify Moore. While appellees correctly note a conviction is not necessary for victim compensation payments to be approved by the Board,
see id.
§ 24-4.1-106(3), it belies common sense to think the Board would have ignored a “not guilty by reason of self-defense” verdict in making its decision regarding Goudie’s status as a “victim.” Furthermore, Goudie’s payment was guaranteed in the event Moore was convicted.
See id.
§§ 24-4.1-108(1), -106(3).
Because we conclude Moore has not demonstrated that the victim witness information was material, we need not determine whether the information was favorable. Accordingly, we hold there was no
Brady
violation. As we discussed in depth while analyzing Moore’s ineffective assistance of counsel claim based on the failure to impeach Goudie with evidence that he had been doing drugs the night before the incident, we do not conclude there was a “reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different.”
Bagley,
473 U.S. at 676, 105 S.Ct. 3375 (internal quotations omitted). There was overwhelming evidence of guilt including: the testimony of multiple witnesses that Moore was the aggressor, the fact that Moore went to Gou-die’s apartment heavily armed and employed each weapon before leaving, and Moore’s admission that he started the fight.
D. Confrontation Clause
Moore’s final claim is that his Sixth Amendment Confrontation Clause rights were violated by the limits placed on his counsel’s ability to cross-examine Goudie. We review claims under the Confrontation Clause de novo.
Fowler,
200 F.3d at 1307. Habeas relief is warranted only if there is an error that was not harmless.
Id.
(citing
Brecht v. Abrahamson,
507 U.S. 619, 637, 113 S.Ct. 1710, 123 L.Ed.2d 353 (1993)). As a general matter, federal habeas corpus relief does not lie to review state law questions about the admissibility of evidence,
see Estelle v. McGuire,
502 U.S. 62, 67-68, 112 S.Ct. 475, 116 L.Ed.2d 385 (1991), and federal courts may not interfere with state evidentiary rulings unless the rulings in question rendered “the trial so fundamentally unfair as to constitute a denial of federal constitutional rights,”
Tucker v. Makowski,
883 F.2d 877,
881
(10th Cir.1989) (quotations and citations omitted).
At trial, the court sustained the prosecution’s motion to disallow cross-examination of Goudie concerning a picture allegedly displaying drugs and drug paraphernalia. The prosecution successfully argued that while such evidence may have been relevant to Goudie’s ability to perceive the events in question, it was not relevant for any other purposes, and thus its value was more prejudicial than probative. Moreover, the court found that the important issue was whether Goudie was intoxicated and not the type of intoxicant used. (II R.O.A., XII State R. at 137 (“The only issue is whether or not he was intoxicated. He has already indicated that he may have been. As to what type of intoxication, I don’t think that is relevant and the court will sustain the objection.”).)
The Supreme Court has stated that the Confrontation Clause does not prevent trial judges from imposing limits on cross-examination.
Delaware v. Van Arsdall,
475 U.S. 673, 679, 106 S.Ct. 1431, 89 L.Ed.2d 674 (1986). In
Van Arsdall,
the Court noted that “trial judges retain
unde latitude
insofar as the Confrontation Clause is concerned to impose reasonable limits on ... cross-examination based on concerns about, among other things, ... prejudice, ... or interrogation that is repetitive or only marginally relevant.”
Id,
(emphasis added). In examining the extent of any alleged harm caused by the court’s limitations we consider factors including “the importance of the witness’ testimony in the prosecution’s case, whether the testimony was cumulative, the presence or absence of evidence corroborating or contradicting the testimony of the witness on material points, the extent of cross-examination otherwise permitted, and, of course, the overall strength of the prosecution’s case.”
Id.
at 684, 106 S.Ct. 1431.
As an initial matter, we have already concluded that impeachment of Goudie on his drug usage would not have had a reasonable probability of changing the outcome of the trial; accordingly, even if the trial court erred, we hold such error was harmless. In weighing the potential harm of the alleged error, we note that the trial court did not limit altogether Moore’s ability to cross-examine Goudie on drug use. In fact, the trial court allowed verbal cross-examination on Goudie’s alleged drug use and even allowed Moore to testify as to whether Moore believed Goudie was under the influence of drugs. The trial court exercised its “wide latitude” of discretion to prevent the admission of a line of questioning it reasonably assessed was more prejudicial than probative. Although the Confrontation Clause guarantees an opportunity for cross-examination, it does “not [guarantee] cross-examination that is effective in whatever way, and to whatever extent, the defense might wish.”
Van
Ars-
doll,
475 U.S. at 679, 106 S.Ct. 1431 (quotations omitted).
Ill
Because the issues raised by Moore’s petition are “debatable among jurists of reason,”
Barefoot,
463 U.S. at 883, 103 S.Ct. 3383, we GRANT Moore’s request for a COA; however, because we do not conclude Moore was deprived of “fundamental rights guaranteed by the Constitution of the United States,”
Tillman,
215 F.3d at 1121 (quotation omitted), we AFFIRM the district court’s denial of habeas relief.