A jury convicted Tony Travis Edmond of first degree murder and sentenced him to life imprisonment. After exhausting his state remedies, Edmond petitioned for federal ha-beas corpus relief pursuant to 28 U.S.C. § 2254 (1988). Edmond asserts that the prosecution, in violation of the state district court’s pre-trial Brady order, failed to produce a palmprint of Edmond’s companion that, according to Edmond, would have impeached eyewitness testimony that he was the trigger man. 1 The district court denied the petition for habeas relief, and Edmond now appeals. 2 We affirm.
I
Edmond fatally shot Luis Cruz while attempting to rob him in May 1985. At Edmond’s trial, Johnny Johnson, an assistant manager at Jerry’s Supermarket, testified that on the day of the murder, Edmond and Robert Charles Brown came into the store. Shortly after they left, Bonifaus Cruz, the widow of the deceased, entered the store screaming that her husband had been shot. Mrs. Cruz testified that she and her husband entered Jerry’s Supermarket to cash Mr. Cruz’s income tax refund check. While walking to their truck after cashing the check, Mrs. Cruz heard a commotion behind her and saw two men pushing their way through *292 the crowd outside the store. Upon reaching their truck, Mr. Cruz opened the driver’s door and leaned across the seat to unlock the passenger’s door for Mrs. Cruz. At this time, Edmond, armed with a pistol, approached Mr. Cruz at the driver’s door and demanded Cruz’s money. Before Mr. Cruz could act, Edmond shot him and fled from the scene, climbing over a barbed wire fence in the process. Later that day, Mrs. Cruz identified two pictures, one of which was a photograph of Edmond, as possibly being that of the killer. At trial, however, Mrs. Cruz- testified positively and unequivocally that Edmond was the person whom she saw shoot her husband.
Edmond, by contrast, testified that he and Brown went to Jerry’s to inquire about working there. Upon leaving the store, he stopped to “flirt” with two women while Brown continued walking. Edmond then heard a “pop” and saw Brown running away from the parking lot. As a result, Edmond panicked, climbed over a barbed wire fence, and ran to Brown’s grandmother’s house where he found Brown. 3 Edmond testified that he asked Brown what happened, but Brown, who was taking shells out of a pistol, did not reply. Edmond denied shooting or attempting to rob anybody. 4
Prior to trial, Edmond requested from the prosecution any evidence material in any way to his guilt or innocence or that tended to impeach any prosecution witness. Although the state district judge ordered the prosecution to produce such evidence, the prosecution failed to produce a palmprint that Brown left on the back of a truck parked next to Cruz’s truck in the supermarket’s parking lot. 5 Edmond did not learn of the palmprint’s existence until approximately one month after his trial concluded.
After exhausting his state remedies, Edmond sought federal habeas corpus relief, contending that the prosecution’s failure to produce the palmprint violated due process. The district court denied Edmond’s habeas petition.
II
On habeas review, a federal court presumes that the state court’s findings of fact are correct.
See
28 U.S.C. § 2254(d) (1988).
6
Moreover, although a state court’s determination of a mixed question of fact and law is not governed by § 2254(d), the presumption of correctness applies to the historical facts underlying the state’s ultimate conclusion of law.
Sumner v. Mata,
Edmond generally contends that the district court erred in holding that no violation of the
Brady
doctrine occurred. The
Brady
doctrine requires the prosecution to produce exculpatory evidence and evidence useful for impeachment when requested to do so by the defendant.
Brady v. Maryland,
Edmond specifically argues that had he known of Brown’s palmprint, he could have impeached Mrs. Cruz’s identification of Edmond as the man who shot her husband. 7 Additionally, according to Edmond, the palm-print evidence would have helped substantiate Edmond’s claims that Brown was in the vicinity of the shooting when Edmond heard the “pop” and saw Brown running. 8 The district court found that no reasonable probability existed that the result of the trial would have been different had the prosecution provided the palmprint evidence to Edmond. We agree — Edmond has not established a Brady violation.
To- establish a valid
Brady
claim, Edmond must demonstrate that the palmprint evidence was material to the issues of guilt or punishment. “The materiality of
Brady
material depends almost entirely on the value of the evidence relative to the other evidence mustered by the state.”
Smith v. Black,
904
*294
F.2d 950, 967 (5th Cir.1990). In reviewing the evidence here, the palmprint evidence was material; however, neither the prosecution nor Edmond disputed that Brown was present in the general area of the murder. Moreover, the use of the palmprint evidence to impeach Mrs. Cruz merely would have been cumulative of other impeachment evidence.
9
See Smith,
[t]he palmprint of Brown would, of course, be objective physical evidence verifying [Edmond’s] claim that Brown was in the area when Mr. Cruz was shot. This evidence, while arguably ‘exculpatory’ was merely cumulative of evidence adduced at trial_ Furthermore, there is no evidence of when the print was put there and it does not, of itself, indicate that Brown shot Mr. Cruz. Indeed, Mrs. Cruz testified unequivocally that she saw [Edmond] shoot her husband. Given Mrs. Cruz’s eyewitness testimony and the other indicia of [Edmond’s] guilt ..., we cannot conclude that there is a reasonable probability that, had the palmprint been disclosed to the defense, the result of the trial would have been different....
Record on Appeal at 32-33.
See Drew v. Collins,
*295 III
Accordingly, we AFFIRM the judgment of the district court. 11
Notes
. In
Brady v. Maryland,
. We previously granted Edmond a certificate of probable cause. See 28 U.S.C. § 2253 (1988).
. Ray Lawrence, a Dallas police officer, testified that he went to a house owned by Brown’s grandmother to look for Edmond and Brown. The police arrested Brown and Edmond, who was found hiding underneath a mattress. Lawrence testified that Edmond, while handcuffed and sitting in the patrol car, pointed his fingers towards the people standing on the front porch and mouthed the words "the gun” in a low voice. Later that day, Lawrence returned to the house, and Brown’s grandmother voluntarily handed over a .22 caliber pistol, the type of handgun used to fatally injure Mr. Cruz.
. Phillip Jones, a Dallas police investigator, testified that after the police arrested Edmond and read him his rights, Edmond told him that Edmond and Brown had seen a male cashing a check at Jerry's Supermarket and decided to rob the man. Edmond and Brown followed the man out to the parking lot. Edmond, before further implicating himself in Cruz’s murder, then asked for counsel and terminated the interview.
. In his brief, Edmond also refers to the prosecution’s suppression of a written statement given by Brown to the police. However, Edmond neither argues the facts surrounding this issue nor briefs this separate allegation. On appeal, we do not review issues not briefed.
See Morrison v. City of Baton Rouge,
. The factual findings of a state court system "shall be presumed to be correct” unless one of the conditions under § 2254(d) applies.
Sumner v. Mata,
. Edmond further contends that because Mrs. Cruz testified that only one assailant was at the truck, the palmprint is material to demonstrate that Brown was near the truck at the time of the shooting. However, the magistrate found that
[t]he victim's wife did not testify that [Edmond] was the only person who was present when he shot her husband; she stated only that she did not see another person with [Edmond] .... Her testimony did not exclude the possibility that the accomplice could have been present but out of her view.
Record on Appeal at 94. The district court adopted this finding. Although Edmond filed written objections to the magistrate's findings, these objections consisted solely of a copy of the brief filed to support the original habeas petition to the district court. Edmond thus did not raise a factual objection by merely reurging arguments contained in the original petition.
Smith v. Collins,
. Edmond also argues that had the palmprint been disclosed, he could have established Brown's culpability and, under the Texas doctrine of the "law of parties,” could have received a more lenient sentence. However, in his brief Edmond admits that the evidence placing the murder weapon in his hand shortly before the shooting of Cruz is sufficient to sustain his murder conviction under Texas law. Thus, Edmond was eligible for the punishment assessed by the jury.
See
Tex. Penal Code Ann. §§ 7.01-.02 (Vernon 1974). Moreover, we treat Edmond’s contention that the jury would have given him a lessor sentence, if the palmprint evidence was introduced, as mere speculation, which presents no issue for appeal.
See United States v. Valdez,
. Edmond impeached Mrs. Cruz's testimony in several ways. For example, Mrs. Cruz testified that she witnessed the shooting through the closed window of the passenger door of the truck. Mrs. Cruz admitted that her in-court statements about her actions immediately following the shooting differed from the written statement that she had originally given the police. Moreover, Mrs. Cruz testified that she was upset and confused after the shooting. Mrs. Cruz verified that shortly after the incident, she could not positively identify the killer from the police photographs, although she did identify Edmond as one of the two suspects. Finally, Edmond impeached Mrs. Cruz’s in-court identification of him as the killer when she misidentified a three-month-old picture of Brown as being a picture of Edmond.
. Edmond nonetheless argues that the palm-print evidence was material, relying on our decision in
Williams v. Whitley,
Edmond further relies on the case of
Bowen v. Maynard,
. Our holding today in no way condones the prosecution's failure to produce the palmprint evidence. Brady commands the prosecution to produce evidence having even a modicum of materiality to a defendant. Here, the prosecution's failure to follow the dictates of Brady does not constitute a due process violation only because the result of Edmond's trial would not have been different had the palmprint evidence been disclosed. We note that such an inquiry could be avoided in future cases if the prosecution simply produces evidence of questionable materiality either directly to the defendant or to the district court for an in camera inspection.
