OPINION
Petitioner-Appellant Clarence Carter, an Ohio prisoner under sentence of death, appeals the order of the district court dismissing his petition for a writ of habeas corpus filed under 28 U.S.C. § 2254. On appeal, he raises several claims challenging trial counsel’s effectiveness, and also challenges the prosecutor’s conduct and the sufficiency of the evidence in light of newly discovered evidence. For the reasons that follow, we AFFIRM the district court’s denial of Carter’s petition.
I. Facts and Procedural History
On direct appeal, the Ohio Supreme Court made the following findings of fact:
In December 1988, Clarence Carter, defendant-appellant, and Johnny Allen were inmates in Range “E” at the Jail Annex to the Hamilton County Courthouse. Allen was being held on a theft offense. Carter had been found guilty of aggravated murder on December 9, 1988, and was awaiting sentencing. On December 28, Carter struck and kicked Allen numerous times over a twenty to twenty-five minute period, necessitating Allen’s hospitalization. On January 5, 1989, Carter was sentenced to life imprisonment for the prior aggravated murder. On January 11, 1989, Allen died as a result of Carter’s assault.
Inmate Joseph Carroll testified that he and Allen were watching television on a mid-December evening when Carter came in and switched channels. Allen said to Carter, “Don’t we vote on this?” Without saying anything, Carter punched Allen in the eye, then resumed watching television. Allen left to clean up the blood flowing from a cut above his eyebrow. Inmates Calvin Johnson and Phillip Brewer confirm that Allen and Carter exchanged words, and that Carter struck Allen. However, Johnson and Brewer assert that Carter was watching TV, and Allen changed the channel. Allen did not report this incident to jail authorities.
Carroll further testified that about a week before December 28, Carter found *521 a broken metal spoon handle in a hole in the shower ceiling. After a brief discussion with Brewer, Carter returned the handle to its hiding place.
On December 28, after lunch, Johnson saw Carter retrieve the metal handle from the shower ceiling. Johnson asked Carter what he was going to do. Carter did not reply. About ten minutes later, around 1:10 p.m., the confrontation which led to Allen’s death began in “E” range, a common area into which approximately twelve cells open.
According to Carroll, Allen was in his cell when Carter told him it was his turn to sweep the floor. As Allen walked past Carter to get a broom, Carter “jumped on him, punched him, [and] knocked him down.” As Allen lay on the floor, Carter “leaned over him, punched him, kicked him and choked him.” Several times during the assault Carter stopped and walked away before returning to the attack. Twice he used a mop to wipe blood off his tennis shoes. During the assault Carroll said to Carter, “[d]amn C.C., you don’t like him, do you.” Carter replied “no,” and went “back down to where Johnny Allen was, punched him, kicked him some more, stomped on him.”
After the second beating, Allen managed to get up and sit on a bench, but Carter came back, knocked him off the bench, and continued to kick and choke Allen. Allen never threw a punch or provoked Carter.
Inmate Calvin Steele described Carter’s initial blow to Allen as a “sucker punch,” delivered suddenly and without warning. Carter struck Allen ten or fifteen times. Allen never struck or attempted to strike a blow at Carter. At one point, Carter returned to his cell and stuck his own leg with some kind of object; he then came back and stomped on Allen’s head with his foot. Carter’s assault on Allen lasted twenty or twenty-five minutes. When Steele asked Carter to stop, Carter told Steele to “[g]et my ass back downstairs.” (Steele was standing outside the range in the “bull run,” the guard’s access way.)
Richard Cunningham saw Carter hit Allen four or five times, then choke Allen, who lay on the floor. As he was beating Allen, Carter said, “[t]hat m .....f.....tried to stab me.” Carter seemed to be in a rage, but appeared to know what he was doing.
Cunningham testified that “Carter started kicking him [Allen] down the range by his head, and by his ribs, and ... he was pulling his head in my bars and stomping his head like a pop can on the floor. And his head was bouncing up off the floor. Blood was everywhere. Guys was on the range saying: Come on, CC, you are going to kill the man. Quit. Leave him alone.... Carter wouldn’t let up. He kept on doing it and doing it, he wouldn’t quit.”
Carter claimed that Allen assaulted him with the shank and that he, Carter, merely defended himself, being carried away with rage. According to inmate Robert Chapman, a defense witness, the fight began when Allen, holding the metal spoon handle, began hitting Carter. However, Chapman acknowledged that he previously told investigators he was asleep. Howard “Tub” Burns, a high school friend of Carter, heard Carter yell, “Tub, get the police.”
Brewer said he saw Carter and Allen arguing on December 28, and Allen was holding some kind of metal object in his hand. After a few seconds, Brewer returned to his cell. He explained, “[i]n a place like that you mind your own business, and that’s what I was doing.”
*522 Around 1:30 p.m., sheriffs deputies heard unusual noises, like an object being banged against steel bars, and went to investigate. When they arrived at “E” range, they found Allen lying face down on the floor, in a pool of blood. Deputy Raymond J. Loebker saw Carter drop the shank. Loebker described Carter as sweating, breathing heavily, but without any visible signs of injury. Sheriffs Lieutenant John Douglas saw the metal handle on the floor, four feet from Allen, and retrieved it for later examination.
Around 5:00 p.m., on December 28, Carter showed Detective John Hinrichs scratches Carter said he sustained in his fight with Allen. Carter had two or three scratches on his right thigh, scratches on his right arm, and a cut on his chest. None was deep or serious, and only the chest cut showed any sign of possible bleeding. Carter, muscular and strong, was in excellent physical condition.
Forensic examination revealed that Carter’s socks, pants, and tennis shoes all contained type “0” human blood. Allen had type “0” blood, but Carter’s blood type was not revealed at trial. Carter’s T-shirt also had human blood, but the stain was not typed. Forensic examination revealed two human blood stains on the metal shank-one stain was type 0, the other was undetermined. The shank had no fingerprints on it.
The jury had to assess the credibility of the principal witnesses under unusual circumstances. Only inmates witnessed the assault, and they all had prior felony records. Additionally, the- prosecution made various beneficial arrangements with inmates who testified for the prosecution. Several inmates who testified for the defense had known Carter before they were incarcerated.
When found, Allen was unconscious and had difficulty breathing. His ribs were pulsating, and blood was running out of his mouth. At University Hospital, Doctor Christopher Miller, a resident neurosurgeon, found bruises and lacerations about Allen’s head, face, and neck. Blood exuded from behind Allen’s eardrums, signifying probable basilary skull fractures. Allen had a low level of brain system reflex functioning and was neither conscious nor able to communicate. Doctors connected life support systems.
Allen had suffered soft tissue swelling between his larynx and spine, but the cervical region was not fractured. A December 28 CAT scan revealed prominent soft tissue swelling over Allen’s left front temporal region, a subdural hema-toma between the brain’s surface and the skull, and diffuse bleeding within the brain. Trauma was the cause of the injuries. However, deprivation of oxygen to Allen’s brain could have been an additional factor.
According to Doctor Harry J. Bonnell, Chief Deputy Coroner, Allen’s heart and breathing stopped on January 10th, but doctors revived him. A January 11th examination revealed that Allen was brain dead. Doctors then disconnected life support systems.
Dr. Bonnell performed an autopsy on January 12th. Allen was 5'10", and weighed 122 lbs. He died as a result of multiple bruises and swelling of the brain, caused either by blunt objects striking his head or by his head striking blunt objects. His brain had been deprived of oxygen prior to arrival at the emergency room. His injuries were consistent with his head having been banged against the floor or against steel bars. In Dr. Bonnell’s opinion, these injuries were fatal, and Allen would have *523 died within twenty-four hours of the trauma without medical intervention.
State v. Carter,
A jury found Carter guilty of aggravated murder with prior calculation and design. Id. at 598. Carter stipulated to the first death-penalty specification that the offense occurred while Carter was a prisoner in a detention facility. Id. The second specification, that Carter was previously convicted of an offense an essential element of which is the purposeful killing of another, was tried to the court, which ultimately found Carter guilty. Id.
The only evidence Carter submitted at mitigation was his own statement. Id. at 602. The jury recommended a capital sentence. Id. at 598. The trial court adopted the recommendation and sentenced Carter to death. Id.
Carter appealed, arguing, inter alia, ineffective assistance of trial counsel, intervening cause of death, and insufficiency of evidence. The Ohio Court of Appeals affirmed the conviction and sentence,
State v. Carter,
No. C-890513,
Carter filed an application to reopen his appeal with the Ohio Court of Appeals under Ohio Appellate Rule 26(B). That court denied the application as untimely,
State v. Carter,
No. C-890513 (Ohio Ct. App. Apr.22, 1994), and the Ohio Supreme Court affirmed,
State v. Carter,
On April 18, 1996, Carter filed with the district court a motion for the appointment of counsel and notice of intent to file a petition for a writ of habeas corpus under 28 U.S.C. § 2254. Carter filed his habeas petition in July 1996. The district court dismissed as meritless all but two of Carter’s seventy claims for relief. The district court held an evidentiary hearing on the remaining two claims. The court concluded that those claims were also without merit and dismissed Carter’s petition. Carter timely appealed to this Court.
This Court granted a certificate of ap-pealability on six claims in Carter’s § 2254 petition: (1) that Carter’s trial counsel 1 rendered ineffective assistance by waiving a mental examination for Carter and not employing a mental health expert; (2) that Carter’s trial counsel rendered ineffective assistance by not requesting the expert assistance of a neuropsychologist; (3) that Carter’s trial counsel rendered ineffective assistance by hot presenting certain mitigating evidence and testimony during the sentencing phase; (4) that Carter’s trial counsel rendered ineffective assistance by failing to present evidence that Carter’s beating of the victim lasted only ten to *524 thirteen minutes, and that the prosecutor withheld evidence of this fact; (5) that the prosecutor improperly, presented false testimony at trial; and (6) that Carter should receive a new trial because newly discovered evidence reveals that insufficient evidence exists to support his aggravated murder conviction.
II. Standard of Review
The standard of review under the Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”), Pub.L. No. 104-132, 110 Stat. 1214 (1996), applies to all § 2254 petitions filed after the AEDPA’s effective date (April 24, 1996), even if the petitioner had filed preliminary motions in the district court prior to the effective date.
Woodford v. Garceau,
In an appeal from a denial of habeas relief under the AEDPA, this Court reviews a district court’s legal conclusions de novo and its factual findings for clear error.
Hill v. Hofbauer,
Under the AEDPA, a federal court may not grant a writ of habeas corpus unless it concludes that the state court’s adjudication of the claim:
(1) resulted in a decision that was contrary to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States; or
(2) resulted in a decision that 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). A state court renders an adjudication “contrary to” clearly established federal law when it “arrives at a conclusion opposite to that reached by [the Supreme] Court on a question of law” or “decides a case differently than [the Supreme] Court has on a set of materially indistinguishable facts.”
Williams v. Taylor,
III. Ineffective Assistance of Trial Counsel
Carter raises four claims of ineffective assistance of trial counsel. He alleges that trial counsel rendered ineffective assistance by (1) waiving a mental examination and not employing a mental health expert, (2) not requesting the expert assistance of a neuropsychologist, (3) not presenting certain mitigating evidence and testimony during the sentencing phase, 2 and (4) not *525 presenting evidence that Carter’s beating of the victim lasted only ten to thirteen minutes.
To prove ineffective assistance of counsel, a petitioner must show deficient performance and resulting prejudice.
Strickland v. Washington,
For [a petitioner] to succeed, ... he must do more than show that he would have satisfied Strickland’s test if his claim were being analyzed in the first instance, because under § 2254(d)(1), it is not enough to convince a federal habe-as court that, in its independent judgment, the state-court decision applied Strickland incorrectly. Rather, he must show that the [state] Court of Appeals applied Strickland to the facts of his case in an objectively unreasonable manner.
Bell v. Cone,
In its post-conviction ruling, the Ohio Court of Appeals “conclude[d], on the state of this record, that through his evidentiary materials, Carter has failed to demonstrate that the conduct of his trial counsel was either ineffective or prejudicial.” State v. Carter, Nos. C-940375, C-940835, at *9 (Ohio Ct.App. Oct. 4, 1995). It therefore held “that the trial court [had] correctly determined that an evidentiary hearing was not warranted regarding any of Carter’s ineffective-assistance-of-counsel claims.” Id. at *10. We now examine whether this conclusion was contrary to or involved an unreasonable application of clearly established federal law.
A. Waiver of Mental Examination and Failure to Employ a Mental Health Expert
Carter claims that trial counsel rendered ineffective assistance by waiving a mental examination and not employing a mental health expert.
Carter’s waiver claim is wholly without merit. The “waiver” in question was trial counsel’s waiver of a mental examination offered by the trial court prior to sentencing. This does not demonstrate that trial counsel unreasonably investigated Carter’s mental state, because, by that point in the proceedings, trial counsel had already retained the services of a psychologist, Dr. Kenneth Manges. Carter conceded as much in his post-conviction petition and in his brief to this Court. (Petr.’s Br. 30 n. 1 (stating that “Carter noted in his post-conviction petition that correspondence in his trial attorney’s file indicated that [trial] counsel had contacted a Dr. Manges”).)
*526
Thus, Carter’s only avenue for success on this claim is to show that trial counsel’s decision to retain
Dr. Manges
was somehow objectively unreasonable, because, according to Carter, “Dr. Manges, [a vocational psychologist,] was not qualified to be a mitigating expert in a capital case.” However, as the government points out, Dr. Manges has received an advanced certification in forensic psychology from the University of Virginia
3
and has testified as a mental health expert in the Ohio state courts.
See, e.g., State v. Mackey,
No. CA99-06-065,
While the Supreme Court has held that a criminal defendant is entitled to the assistance of a competent psychiatrist if the defendant can demonstrate that his sanity will be a significant issue at trial,
Ake v. Oklahoma,
Ake
and
Powell
are inapposite nonetheless. As the
Ake
Court was careful to note, “[a] defendant’s mental condition is not necessarily at issue in every criminal proceeding, ... and it is unlikely that psychiatric assistance of the kind we have described would be of probable value in cases where it is not.”
Ake,
As for
Powell,
we first note that it was a pre-AEDPA decision whose holding has never been adopted by the Supreme Court. Thus,
Powell
can have no legal effect on post-AEDPA habeas cases.
See
28 U.S.C. § 2254(d) (defining “clearly established Federal law” for purposes of the AEDPA analysis as the law “as determined by the Supreme Court of the United States”). In any event,
Powell
is also distinguishable on the facts. The trial court in that case granted a defense motion for appointment of a psychiatrist because the court recognized that Powell’s “mental competency had been placed in issue” before trial,
Powell,
Counsel does not perform unreasonably merely by not ruling out every possible psychological mitigator through specialized evaluations.
Cf. Lundgren,
B. Failure to Retain a Neuropsychologist
Carter’ also argues that, had trial counsel retained an expert neuropsychologist, the neuropsychologist would have concluded that Carter suffers from organic brain impairment, and that such evidence could have been presented at mitigation to support a lower sentence. In his post-conviction motion, Carter presented affidavits from three mental health experts: Dr. James C. Tanley, Dr. Judith H. Skillings, and Dr. Newton L.P. Jackson. Specifically, Carter argues that a mental health expert “could have put Mr. Carter’s life and personality in a context the jury would have understood,” and that expert testimony was relevant to whether Carter “ ‘lacked substantial capacity to appreciate the criminality of [his] conduct or to conform [his] conduct to the requirements of the law.’ ” (Petr.’s Br. 39 (quoting
Frazier
*528
v. Huffman,
Dr. Skillings is a clinical psychologist who specializes in chemical dependency and cross-cultural issues. She concluded that Carter’s antisocial acts are the result of being subjected to violence and alcoholism during his youth and of the trauma from racial harassment, and are not “per se part of an antisocial personality structure.”
However, Dr. Skillings never even met with Carter or any members of his family. Her opinions were based entirely on the affidavits of Carter’s family members, the sentencing phase trial trahseript, and Carter’s school records. An examination of these records shows that many of her findings are questionable, however. For example, Dr. Skillings remarked that there was “little structure or discipline in the home.” There is no similar statement from the records Dr. Skillings referenced. To the contrary, Carter’s step-father, William Walton, and siblings all mentioned Walton’s attempts to strictly discipline the children. Also, Dr. Skillings concluded that Carter was affected by the frequent “violence between his parents.” However, George, Jr. was the only family member who mentions any violence between Brenda Walton and George, Sr., saying, “My father may have hit my mother once or twice” (emphasis added). To the extent any such incident did occur, it would have been when Carter was still very young, meaning its effects on Carter would be entirely unclear, at least for someone relying entirely upon the limited information before Dr. Skillings.
Dr. Jackson is a forensic psychologist (like Dr. Manges, incidentally). He concluded that Carter suffered from a type of organic brain dysfunction that causes a loss of control during violent incidents. 4 He also stated that Carter’s tests results were inconsistent with those generated by individuals who commit premeditated acts of violence, implying that Carter’s attack was likely not premeditated.
Contrary to Dr. Jackson’s opinions, the prosecution presented significant evidence at trial that prior to any violent incident, Carter had been planning to attack Allen in retaliation for changing the channels on the jailhouse television. Further, several witnesses testified that Carter had broken off his attack of Allen more than once, only to resume beating him. Inmate Richard Cunningham testified that “Carter kept on beating [Allen] until he heard the [guards’] keys. He heard the keys, he went on back to his cell.” In short, the evidence at trial completely contradicts Dr. Jackson’s conclusions that Carter lost his self-control during the altercation and that Carter was not likely to have committed a premeditated act of violence.
Dr. Tanley was the only neuropsychologist Carter retained in support of his post-conviction claim that trial counsel rendered ineffective assistance by not hiring a neu-ropsychologist. Dr. Tanley stated that Carter has difficulty understanding the spoken word and struggles with complex information and novel situations. He ultimately concluded that “a competent clini *529 cal psychologist should have recommended a complete neuropsychological evaluation for [Carter].”
Despite Carter’s claim that a neuropsy-chologist would have diagnosed Carter as having organic brain disorder, Dr. Tanley did
not
diagnose Carter as suffering from organic brain dysfunction or brain damage. He stated only that there is a “likelihood” that Carter has “some kind of brain related difficulty.” He even admitted that Carter’s score on the Impairment Index is “below the normal cutoff ... for reliably stating that brain damage exists.” Carter, then, wholly failed to show any error relating to trial counsel’s decision not to hire a neuropsychologist.
See Martin v. Mitchell,
Moreover, Dr. Tanley did not provide any temporal relationship between Carter’s possible brain damage and his altercation with Johnny Allen. Dr. Tanley evaluated Carter nearly five years after Carter killed Allen, but Dr. Tanley did not address what impact events in the intervening five years could have had on his diagnosis. In other words, Carter failed to show that the brain damage, if any, even existed at the time of the incident.
Finally, Dr. Tanley did not make any connection between Carter’s possible brain' damage and his violent altercation with Allen. Similarly, the nebulous references in Carter’s briefs to Dr. Tanley’s diagnosis do not establish a causal link. Carter focuses on Dr. Tanley’s statements that Carter performs poorly in novel, complex situations that require thinking through a problem, and has trouble understanding the spoken word. It is difficult to see how Carter’s diminished capácity in novel, complex situations and his trouble understanding the spoken word are at all relevant to the events at issue. The evidence at trial showed that Carter had been planning an attack for days. At more than one point during the altercation, Carter ceased beating Allen only to resume a short time later. One witness recounted that at some point Carter went to his cell, stabbed himself in the leg, and returned to continue beating Allen. Another recalled that twice Carter interrupted his beating of Allen to clean his shoes with a mop. In other words, the evidence at trial did not show this to be a “novel, complex situation” that Carter was incapable of thinking through, but rather the act of a calculating, coldblooded killer. Rather, his preparation and attempts to establish exculpatory circumstances during the event demonstrate that he fully appreciated the situation and its potential consequences.
In Lorraine, like here, petitioner claimed his trial counsel rendered ineffective assistance by failing to uncover evidence of organic brain damage. Id. at 436. Similarly, petitioner’s habeas counsel did not find evidence of organic brain damage. Id. The court concluded that “if habeas counsel could not find evidence of organic brain damage, then trial counsel cannot be *530 deemed ineffective .... Nor can there be any prejudice.” ‘Id.
Absent actual, probative evidence relating to Carter’s mental health that trial counsel missed, there can be no prejudice and therefore no ineffective assistance of counsel under Strickland. In short, Carter offered no evidence to show, under the facts of his case, that, trial counsel’s decision not to retain a different specialist was objectively unreasonable. We conclude, then, that the Ohio Court of Appeals’ decision denying Carter relief on this claims of ineffective assistance of counsel was not contrary to or an unreasonable application of clearly established federal law. Thus, we affirm the denial of the writ on this issue.
C. Failure to Present Certain Evidence at Mitigation
Next, Carter claims that trial counsel rendered ineffective assistance by not presenting certain mitigating evidence and testimony during the sentencing phase. The only evidence presented at sentencing was Carter’s own statement, in which he described being raised by his “troublesome” stepfather, acknowledged his anger problems, and stated that he has since turned to prayer and religion to control his temper and counsel troubled youths.
State v. Carter,
The Ohio Court of Appeals concluded that Carter had failed to establish either ineffective assistance of trial counsel or prejudice, finding that “the affidavits cited by Carter to.support this claim contained information which was essentially cumulative to that already presented [in his statement] and did not present evidence sufficient to warrant an evidentiary hearing on this claim.” State v. Carter, Nos. C-940375, C-940835, at *12 (Ohio Ct.App. Oct. 4,1995).
Although it appears that counsel failed to contact three of Carter’s family members, his younger brother, LaMarck; his older brother, George, Jr.; and his paternal aunt, Mary Coleman; their testimony would have offered little insight. They do not appear to have witnessed, nor been themselves, significant influences on Carter’s life. Conversely, there are no allegations that counsel did not contact the *531 four family members who appear to know more about Carter and his background than anyone else-his mother, his step-father, his sister, and his half-sister. Also, curiously absent from the record is any statement from trial counsel describing what he did or did not do in investigating Carter’s background. By not detailing trial counsel’s efforts to learn of Carter’s background, Carter has provided no basis for a finding that trial counsel’s investigation was unreasonable.
Even if trial counsel had rendered ineffective assistance, Carter was not prejudiced by it. The testimony Carter’s family members were prepared to give-other than that which would have been cumulative to Carter’s own statement-can hardly be described as mitigating. In fact, the affidavits describe a relatively stable, although imperfect, family environment. There are no allegations of physical or sexual abuse of Carter. While his father, George, Sr., was apparently an alcoholic and may have physically abused his mother, Brenda Walton, once or twice, 6 he left his family around the time Carter was three years old, and Carter has had almost no contact with him since. About the time George, Sr. left, Brenda Walton began dating William Walton, whom she later married. Brenda’s children lived with her and William. They were a religious family, attending weekly church services and Bible study classes. William did his best to maintain discipline in the house, often through the use of corporal punishment. Eventually, William and Brenda moved the family from “the projects” in downtown Cincinnati to Mt. Healthy, Ohio, a more affluent suburb, in order “to get the kids into a better atmosphere” and escape an area that “had become infested with drug pushers.”
Moreover, had the family members’ testimony been admitted, the prosecutor would have been free to extract testimony of Carter’s criminal history, his history of drug use and alcohol abuse, and his notoriously quick temper and violent character. There are multiple references in the affidavits to Carter’s experience with the criminal justice system, including one incident where Carter turned himself in after beating someone with a baseball bat. Brenda Walton stated that she has seen Carter fight, but that “[h]e only jumped on people for a reason.” She also recounted that at fourteen or fifteen, Carter began stealing for drug money. Marrell noted that Carter had been expelled from school “for breaking a white kid’s jaw during a fight.” She also stated that Carter “had a quick temper.... [His] temper would flare up even if he hadn’t been drinking.” Carter’s brother LaMarck stated that he and Carter “fought with [their] fists and had reputations at [their] schools.” He further remarked that Carter
had a bad temper.... At fifteen he could still be reasoned with, but at twenty a confrontation usually ended in a fight. [Carter] would have to get a punch in and could not stop until he felt like it. As an adult, [Carter] would go off over something as simple as when I chastised our twin brothers.
Carter once beat a student and tried to “stuff his head down the sewer.” George, Jr. said that Carter “would fight until he had demolished his opponent or was ready to quit.” Several family members also mentioned Carter’s penchant for alcohol and regular use of marijuana. In short, the testimony of Carter’s family members *532 likely would have reinforced that he was a temperamental, violent person despite his relatively stable background.
The Supreme Court has found more limited investigations into a defendant’s background justified where any evidence presented would have a “double edge.”
Wiggins v. Smith,
Given the lack of mitigating evidence available in this case and the likelihood that the testimony of Carter’s family members would have done more harm than good, this was a sound decision.
Cf. Strickland,
Carter’s reliance on
Austin v. Bell,
Likewise, the three other cases Carter cites as comparable to his own are not.
See Wiggins,
Therefore, we conclude that the Ohio Court of Appeals’ denial of relief on this claim was neither contrary to nor an unreasonable application of clearly established federal law.
D. Failure to Present Certain Evidence at Trial
Carter claims that trial counsel rendered ineffective assistance by failing to present evidence that Carter’s beating of the victim lasted only ten to thirteen minutes. The prosecution’s theory, based on the testimony of several eye witnesses, was that the beating lasted approximately twenty to twenty-five minutes. Carter’s basis for claiming it was shorter is the testimony of inmate Richard Cunningham that the incident started at 1:15 p.m., combined with prison reports that security personnel responded to the situation between 1:25 and 1:30 p.m. It is Carter’s position that trial counsel should have emphasized the shorter time span to show the attack occurred in a heat of passion rather than deliberately and premeditatedly. 7
Although Cunningham did testify that the fight “probably started about quarter after 1:00,” he also testified that he was forced to estimate the exact time because he had no clock or watch available to him. As a result, he based his estimate on the fact that he had to end a telephone call at 1:00 p.m. that afternoon and that he believed about fifteen minutes had passed between the end of his phone call and the start of the fight. At the very least, then, a defense theory based on Cunningham’s statement of time would have been tenuous.
Moreover, Carter’s habeas theory that the fight lasted only ten to fifteen minutes lacks any reasonable basis. First, as stated above, Cunningham had made clear *534 that his statement of time was a mere estimate. In other words, he had no way of knowing the exact time the fight started. Furthermore, Cunningham testified on cross that he did not even witness the start of the fight. Since Cunningham lacked personal knowledge, his testimony as to when the fight started is irrelevant. Finally, Cunningham himself testified that the beating lasted much longer than fifteen minutes:
Q. How long did [the beating] go on?
A. For about 25 minutes.
Q. You have no watch or anything that you can tell time or anything or a clock on the wall or anything?
A. No. You know, I estimate 25 minutes, he probably started about quarter after 1:00, I knew it was 1:00 o’clock I had to get off the phone, that is my time to get off the phone. It took about 15 minutes before I got my cigarette lit. The guards got up there about quarter to 2:00. It took about half hour to 45 minutes before they even got up there.
In short, then, there is no credible factual basis from which Carter can argue that reasonable counsel would have pursued the theory that the altercation lasted no more than fifteen minutes.
Most importantly, trial counsel’s strategy with Cunningham on cross examination focused not on Cunningham’s estimation of when the fight started but whether he saw the start of the fight at all. Cunningham testified on direct examination that the altercation began when Carter “sucker punched” Allen while Allen was asleep. On cross, trial counsel questioned Cunningham as to his whereabouts when the fight began, and Cunningham admitted that he did not see what started the altercation. Cunningham’s testimony on cross-examination preserved trial counsel’s primary defense theory that Allen, not Carter, was the aggressor. If believed, Carter could have avoided a jury finding that he killed Allen with prior calculation and design. At the very least, he could have used it as a mitigating factor at sentencing. Trial counsel’s strategy to paint Allen as the aggressor was reasonable, and to question Cunningham in a manner consistent with this theory, counsel was not ineffective.
Carter also was not prejudiced. Both Cunningham and inmate Steele testified that the beating lasted approximately twenty-five minutes. There is no credible evidence to dispute their estimates. Equally important is that there is no reason to believe that proof that the beating lasted ten minutes instead of twenty or twenty-five minutes would have had any effect on the outcome. The emphasis at trial was not on the duration of the beating, but on the calculated and violent manner in which it was carried out. This included Carter’s comments and actions before and during the altercation, along with his efforts to create exculpatory evidence. Furthermore, in this ease, even a ten-minute altercation would have been significant. The altercation at issue was nothing more than an attack. That Carter’s continuous beating of Johnny Allen may have lasted “only” ten minutes would hardly be seen as mitigating. Quite simply, there is no merit to Carter’s claim that he was prejudiced by trial counsel’s failure to emphasize that the attack may have lasted only ten minutes.
Therefore, the decision of Ohio Court of Appeals denying Carter’s ineffective-assistance claim was neither contrary to nor an unreasonable application of clearly established federal law.
IV. Other Issues
A. Presentation of False Testimony
Carter also alleges that the prosecutor improperly presented false testimony at *535 trial. Specifically, he claims that the prosecution’s failure to correct the false testimony of one of its witnesses, inmate Calvin Steele, violated Carter’s due process rights. The testimony at issue involved Steele’s answers to trial counsel’s questions on cross-examination. During one exchange, Steele denied having an agreement with the prosecution in exchange for his testimony, even though he had already acknowledged having such an agreement on direct examination.
The Ohio Court of Appeals noted that in order for the prosecution’s use of allegedly false testimony to state a constitutional claim, that use must have been knowing, ie., the prosecution must have been aware that it was suborning perjury. Carter makes no attempt to establish that the state knew of any perjured testimony. Moreover, the affidavits offered in support of this claim did not support the arguments that Carter was convicted with false testimony or that key impeachment evidence was withheld.
State v. Carter, Nos. C-940375, C-940835, at *18 (Ohio Ct.App. Oct. 4,1995) (citations omitted). Accordingly, the court denied Carter relief on this claim. Id.
The district court held an evidentiary hearing on the issue, during which the prosecutor agreed that Steele’s testimony on cross-examination was inconsistent with the responses he had given on direct examination. The court ultimately found the claim meritless, however, because Carter had not shown that the prosecutor knowingly presented false testimony. The district court held an evidentiary hearing on the issue, and, thus, we review the factual findings for clear error while reviewing the ultimate conclusion de novo.
Hill v. Hofbauer,
It was well-established at the time of Carter’s trial that a defendant’s right to a fair trial may be violated where the prosecution deliberately misleads a jury or allows misleading testimony to go uncorrected with respect to any promise offered to a key prosecution witness in exchange for his testimony.
See Giglio v. United States,
On direct examination, Steele clearly indicated that he had agreed to testify in exchange for the prosecution’s consideration in his own criminal case. 8 However, on cross-examination, Steele denied that he was ever offered any deal by the prosecution in exchange for his testimony. 9 The *536 prosecutor made no attempt to correct these misstatements.
Both the state court and the district court concluded that no constitutional violation occurred based on the fact that Carter had not proven that the prosecutor knowingly presented false testimony. However, neither court addressed the Gig-lio issue specifically, that is, whether the prosecutor deliberately allowed misleading testimony to go uncorrected with respect to any promise offered to a key prosecution witness in exchange for his testimony.
Nonetheless, the state court’s decision was not “contrary to” clearly established federal law, because the facts of
Napue
and
Giglio
are distinguishable from the facts of this case. In
Napue,
the state’s sole eyewitness falsely testified that he was receiving no consideration from the state in return for his testimony, even though the prosecutor had promised to help him if the witness’s story “‘about being a reluctant participant’ in the robbery was borne out.”
Napue,
tion’s case in
Giglio
“depended almost entirely on [that witness]’s testimony.”
Id.
at 154,
Unlike the witness in Napue, Steele had an agreement with the state in exchange for his testimony generally, not in exchange for a particular version of the facts. And unlike Giglio, the prosecutor here did not tell the jury that he had no agreement with Steele. In fact, the prosecutor here told the jury in his opening statement that there was such an agreement, and elicited an admission to that effect during his direct examination of Steele. Perhaps most importantly, unlike either of those cases, Steele was not the lynchpin of the state’s case against Carter. Steele was one of four inmate-eyewitnesses the prosecution called. All four testified to the events during the altercation, and two of them— neither of whom was Calvin Steele — -testified to events prior to the beating that evidenced Carter’s prior calculation and design. Thus, Napue and Giglio are clearly distinguishable from the facts of this case. Accordingly, we cannot say that the decision of the Ohio Court of Appeals was “contrary to” clearly established federal law.
*537
Nor was the state court’s decision an “unreasonable application of’ clearly-established federal law, because
Napue
and
Giglio
require a new trial only where “ ‘the false testimony could ... in any reasonable likelihood have affected the judgment of the jury.’ ”
Giglio,
Moreover, for these same reasons, any constitutional error would have been harmless under
Brecht v. Abrahamson,
B. Newly Discovered Evidence/Insufficient Evidence to Support Conviction
Finally, Carter claims that he should receive a new trial because newly discovered evidence reveals that insufficient evidence exists to support his aggravated murder conviction. Carter bases this claim on the affidavits of two witnesses who testified for the prosecution at trial and on the affidavit of another inmate, Chris Isome, who did not testify at the trial. The witnesses’ affidavits recant their trial testimony, claiming they lied because of the deals the prosecution promised them. Isome’s affidavit states that Allen threatened revenge against Carter after their confrontation over the television.
The Ohio Court of Appeals concluded that this claim was procedurally defaulted. Carter, Nos. C-940375, C-940835, at NO-ll. The court also denied Carter’s claims on the merits, concluding “that the purported ‘newly discovered evidence’ was merely cumulative of evidence presented previously and that it did not undermine the jury’s conclusion that Carter killed Allen with prior calculation and design.” Id. at *11. The district court found the claim procedurally defaulted and held an eviden-tiary hearing on the matter to determine whether Carter had established actual innocence to excuse the procedural default. Following the evidentiary hearing, the district court found no reason to excuse the default and ultimately denied the claim.
Generally, federal courts may not consider habeas claims not considered by the state courts due to procedural default.
Seymour v. Walker,
Citing its decision in
State v. Zuem,
the Ohio Court of Appeals held that Carter’s claim was barred under res judicata because it could and should have been raised in a motion for a new trial under Ohio Rule of Criminal Procedure 33(B), and not in a successive petition for post-conviction relief.
Carter,
Nos. C-940375, C-940835, at *15-16. Although the state court also denied Carter relief on the merits, “[w]hen the state court relies on an independent procedural ground in order to deny relief, its discussion of the merits of the claim will not disturb the procedural bar.”
Clifford v. Chandler,
This court has consistently held that Ohio’s doctrine of res judicata is an “adequate and independent” ground justifying default.
See, e.g., Williams v. Bagley,
Lastly, Carter does not argue “cause” to excuse the procedural default, and no cause is apparent from the record. Having determined that no cause exists, we need not decide whether Carter suffered any prejudice.
See Lott v. Coyle,
The final inquiry is whether a miscarriage of justice would result through enforcement of the procedural default. A miscarriage of justice exists in the extraordinary case where the petitioner demonstrates his actual innocence.
Murray v. Carrier,
Carter cannot establish his actual innocence because he admitted killing Al
*539
len at sentencing.
10
Instead, he argues that this evidence creates reasonable doubt as to whether he killed Allen with prior calculation and design. However, none of the “newly discovered evidence” casts any doubt on Carter’s conviction or sentence. Isome’s affidavit merely provides evidence of Allen’s state of mind prior to the altercation; it says nothing about Carter’s state of mind or whether Carter acted with prior calculation and design. The affidavits of Steele and Johnson, both still inmates in the Ohio correctional system, are of little value, as they merely recant their trial testimony.
See Dobbert v. Wainwright,
y.
For the foregoing reasons, the judgment of district court is AFFIRMED.
Notes
. Carter had more than one attorney representing him at trial. For simplicity, we will refer to them collectively as a singular "trial counsel.”
. The district court erroneously concluded that the first three ineffective assistance claims were procedurally defaulted and, thus, did not reach the merits. The highest state *525 court to review the case dismissed the claims on the merits and not on the basis of procedural default, and the government concedes that these claims are not procedurally defaulted. (Respt.'s Br. 28.)
. See http://www.mdex online.com/ services/eda/map/edn_ohio/ kennethmanges-bio.cfm (last visited Feb. 21, 2006).
. Dr. Jackson references a discussion he had with Dr. Tanley regarding their diagnoses of Carter. Curiously, Dr. Jackson suggests that he and Dr. Tanley reached similar clinical conclusions "regarding the presence of indicators of organic brain dysfunction which could have caused ... Carter, at the time of the altercation with Johnny Allen, to have been unable to alter or control his course of conduct at that time." As noted infra, however, Dr. Tanley did not make the connection between Carter’s possible brain damage and his violence against Allen, nor did he conclude that Carter suffers from organic brain dysfunction.
. Ohio’s death penalty statute requires that the finder of fact weigh mitigating factors against the aggravating factors (i.e., stipulations) proved beyond a reasonable doubt. These mitigating factors include the nature and circumstances of the offense; the history, character, and background of the offender; whether the victim induced or facilitated the killing; likelihood that the killing occurred as a result of duress, coercion, or strong provocation; and the offender's lack of criminal history and delinquency adjudications. Ohio Rev.Code Ann. § 2929.04(B).
. The only reference to any alleged abuse is found in George, Jr.'s affidavit stating that it "may” have occurred.
. He also claims that the prosecutor improperly withheld evidence that the beating lasted only ten to thirteen minutes. The Supreme Court in
Brady v. Maryland
held that "the suppression by the prosecution of evidence favorable to an accused ... violates due process where the evidence is material either to guilt or to punishment, irrespective of the good faith or bad faith of the prosecution.”
Carter's
Brady
claim is wholly without merit. The information regarding the timing of the altercation was fully extracted from witnesses at trial, and Carter had an opportunity to question them about it. Carter concedes that trial counsel had copies of three reports detailing the time of the security response.
See United States v. Todd,
. Q.And on January 30, 1989, you entered into a plea to an offense known as attempted aggravated burglary, which you were charged with, without a specification that required a prior conviction, that was attached to that charge; is that correct, sir?
A. Yes, sir.
Q. And in addition to that, a charge of possessing criminal tools was dropped against you by the state; is that correct, sir?
A. Yes, sir.
Q. And in the course of that, Judge Sun-dermann ordered your sentencing continued pending the preparation of the pre-sentence investigation?
A. Yes, sir, that's correct,
Q. And also indicated that he would delay said sentencing until such time as you had appeared in this court and testified; is that correct?
A. Yes, sir.
Q. And this is your understanding?
A. Yes, sir.
. Q. Well, nobody ever offered you any consideration to make this statement, right?
*536 A. That’s right, sir.
Q. How did this deal come to pass?
A. What deal?
Q. The one where your specifications were dropped and your sentencing could be continued until after this testimony?
A. I mean the specifications, they do that normally every day in courts.
Q. So you didn’t enter into an agreement with [the prosecutor] in order for you to testify?
A. No, I did not.
Q. And you didn't ask that your sentencing be put over until after you testified so that the judge could give consideration to this?
A. Well, me and the judge discussed it because of the pending testimony and he didn’t say anything about reducing the sentence or anything of that nature.
Q. Now, I know the prosecutor can’t say to you specifically, we are going to do this deal for you. But did he tell you that if you came in and you testified that he would consider it and help you out down the road?
A. No, he didn’t.
Q. He never did that for you?
A. (Shaking head in the negative).
. Q.[Carter], do you have remorse, or do you feel soriy for what happened, for what you did to Johnny Allen?
A. Yes, I feel sorry. I have been feeling sorry for it, you know. I told people how sorry I am for it, and especially for his mother, you know. I feel a lot for his mother, you know, because I know that, you know, she had him, and that was her child, and I did take his life. But I feel sorry for it. I am sorry for it.
. Carter argues that the district court erred by not compelling Steele and Johnson to testify at the evidentiary hearing after they had invoked their Fifth Amendment rights. “A defendant’s right to compel a witness to testify must yield to that witness’s assertion of his or her Fifth Amendment privilege against self-incrimination when that assertion is grounded upon a reasonable fear of prosecution.”
United States v. Mack,
Johnson had a reasonable basis to fear prosecution for perjury based on Steele's perjury conviction. Steele, in turn, had a reasonable fear of prosecution based on his own perjury conviction in state court. Steele did not lose his reasonable fear of prosecution based on his state-court conviction,
see United States
v.
Smith,
