Defendant Charles Anthony Boyd was convicted of capital murder and sentenced to death. 1 He requests a Certificate of Probable Cause (“CPC”) to appeal the district court’s denial of his petition for habeas corpus under 28 U.S.C. § 2254. He contends that the district court erred because (1) counsel was ineffective for failing to present mitigating evidence of his retardation to the jury at sentencing; (2) the jury was prevented impermissibly from giving mitigating effect to evidence of his retardation and his positive character traits; (3) the failure to instruct the jury on the parole implications of a life sentence in a capital case rendered the Texas sentencing scheme unconstitutional; and (4) the admission of extraneous offensеs at the sentencing phase violated due process and *909 the Eighth Amendment. We deny Boyd’s request for a CPC.
I
A Texas jury convicted Boyd of capital murder in 1987, and sentenced him to death, answering affirmatively the special sentencing issues.
2
On direct appeal, the Texas Court of Criminal Appeals affirmed his conviction.
See Boyd v. State,
Boyd then filed a federal habeas petition in district court pursuant to 28 U.S.C. § 2254. The district court denied habeas relief for all but two of Boyd’s claims. The district court ordered an evidentiary hearing concerning the claim that trial counsel’s failure to develop and to present evidence of Boyd’s mental retardation constituted ineffective assistance of counsel, and the claim that the trial court erred in failing to give a jury instruction under
Penry v. Lynaugh,
II
Boyd argues he received ineffective assistance of counsel in violation of the Sixth Amendment. He asserts that he received ineffective assistance because his trial counsel failed to discover and to present evidence of mental retardation, which could have been used to challenge the voluntariness of his confessions and could have been relevant to the jury in determining whether to impose the death penalty.
In order to prove ineffective assistance of counsel, Boyd must show (1) deficient performance, meaning that the attorney’s representation “fell below an objective standard of reasonablenеss,” and (2) that the deficient performance resulted in actual prejudice.
Strickland v. Washington,
According to Boyd, his trial counsel performed deficiently in failing to discover mitigating evidence of his mental retardation. At trial, his attorneys introduced two prison packets that were created during Boyd’s pri- or incarceration. One prison packet indicated Boyd has an I.Q. of 67, and the other *910 stated his I.Q. is 80. At the evidentiary-hearing, Boyd presented testimony from Dr. Jamеs Shadduek that an I.Q. below 70 indicates retardation, and that Boyd received an I.Q. score of 64 on a test administered by him. Shadduek testified he had reviewed school records showing an I.Q. of 71. Shad-duck concluded that Boyd was retarded and that his retardation should have been apparent to any observer. Dr. Alan Hopewell also testified that he had examined Boyd and fоund him to be retarded. Other witnesses testified to Boyd’s mental state, including family members and attorneys who had worked with Boyd. Citing the I.Q. tests introduced at trial, along with the post-trial I.Q. tests, Boyd alleges that his counsel’s failure to investigate his mental capacity constituted ineffective assistance.
The district court found that the evidence of Boyd’s retardation is conflicting. The district court stated that the credibility of Drs. Shadduek and Hopewell suffered on cross-examination. The credibility of Boyd’s mother and sister, who testified to Boyd’s retardation, was undermined by their earlier contradictory testimony at the sentencing phase of the trial. The district court did not credit the testimony of two of Boyd’s other witnesses who were either employees or associates оf Boyd’s present counsel.
Other evidence cast doubt on the obviousness of Boyd’s retardation. Boyd’s attorney Paul Brauchle testified that he did not believe that Boyd was retarded, based on his observations of Boyd and from information from Boyd’s family. He stated that Boyd assisted him in the jury selection process and that he was unable to remember having had information that Boyd scored low on an I.Q. test. The district court found Brauchle’s testimony credible. The district court additionally found the testimony of Michael Byck, who also served as trial counsel, to be highly credible. Byck testified he saw no “red flags” that would indicate Boyd’s retardation. Conversations with Boyd’s family, and the school records, did not suggest to Byck that Boyd was retarded. The district court concluded thаt the isolated I.Q. score of 67 in the prison packet was not enough to compel the attorneys to investigate, when the other evidence available at trial contradicted a suggestion of retardation.
Under
Strickland,
we consider whether the failure of Boyd’s counsel to develop and to present the evidence of retardation constituted deficient рerformance. Boyd’s lowest I.Q. score of 64 is on the upper borderline of mental retardation.
See Penry,
The evidence of Boyd’s retardation must be considered in tandem with the impressions that he gave the аttorneys. “The reasonableness of counsel’s actions may be determined or substantially influenced by the defendant’s own statements or actions.... In particular, what investigation decisions are reasonable depends critically on such information.”
Strickland,
Even had counsel been aware of Boyd’s retardation, it was not ineffective assistance to abstain from further investigation. The Court determined in
Penny
that mitigating evidence of mental retardation has relevance to moral culpability beyond the special issues.
See Penny,
Additionally, Boyd contends that counsel rendered ineffective assistance because, apart from the sentencing phase, evidence of mental retardation could have been used to challenge the voluntariness of his confession. The trial judge admitted Boyd’s confession after a hearing to determine the voluntariness of his confession. Boyd has not shown that the conflicting evidence of borderline retardation would have had any impact on the resolution of this issue. We conclude therefore that Boyd’s counsel did not prejudice him by failing to develop retardation evidence to challenge his confession. Boyd has not substantially shown the denial of his right to effective assistance of counsel.
Ill
According to Boyd, the Texas capital sentencing scheme in effect at the time of his sentencing, Art. 37.071 of the Texas Code of Criminal Procedure, impermissibly limited the jury’s ability to give effect to mitigating evidence that he presented at triаl. The Supreme Court held in
Penny
that if a jury cannot give effect to mitigating evidence about a defendant’s background, character, or other circumstances that reflect a reduced moral culpability, then the trial court must provide instructions that allow the jury to consider such evidence.
See Penry,
In considering a
Penny
claim, we determine (1) whether the evidence was constitutionally relevant mitigating evidence, and if so, (2) whether the evidence was beyond the effective reach of the jurors.
See Davis v. Scott,
A
Boyd contends thаt the evidence of his retardation entitled him to a special jury instruction under
Penry.
4
,
A petitioner cannot base a
Penry
claim on evidence that could have been but was not proffered at trial.
See West v. Johnson,
In order to be entitled to a special instruction, however, Boyd must show how the evidence of retardation is constitutionally relevant mitigating evidence. Even assuming the I.Q. score establishes a “uniquely severe permanent handicap,” it does not establish “that the criminal act was attributable to this severe permanent condition.”
Davis,
B
Boyd contends that the special issues prevented the jury from fully considering testimony from his employer, family members, and friends regarding his positive character traits. He believes that this testimony entitled him to a general mitigation instruction under Penry, because the evidence was beyond the scope of the special issues. The failure to provide such an instruction thus violated his right to due process under the Fifth and Fourteenth Amendments, and his right to be free from cruel and unusual punishment under the Eighth Amendment.
We have rejected this argument on the merits. Evidence of good character tends to show that the crime was an aberration, which may support a negative answer to the special issue regarding the future dangerousness of the defendant.
See id; Barnard v. Collins,
IV
Boyd argues that the Texas sentencing scheme is unconstitutional because the trial court did not instruct the jury concerning the parole implications of a life sentence in a capital case. In
Simmons v. South Carolina,
V
Boyd asserts that the admission of similar unadjudieated offensеs during the punishment phase, without a limiting instruction, violated his right to due process under the Fifth and Fourteenth Amendments and constituted cruel and unusual punishment in violation of the Eighth Amendment. Boyd previously conceded the probative value of evidence of two earlier killings, which were committed under identical factual circumstances, as to the issue of his future dangerousness. He maintains that the court should have provided an instruction limiting the jury’s consideration of the extraneous evidence to that issue alone.
The evidence of the extraneous offenses was, as the Magistrate Judge found, relevant to the first and third special issues. The similarity of the other offenses was probative as to the first issue, whether Boyd acted deliberately. The othеr offenses also were relevant to the third issue, whether he acted in response to provocation by his victim. Even if the evidence was not relevant directly to the first or third special issues, the Constitution does not require a limiting instruction. We have acknowledged that:
[T]he Constitution does not prohibit consideration at the sentencing phase of information not direсtly related to either statutory aggravating circumstances or statutory mitigating factors, as long as that information is relevant to the character of the defendant or the circumstances of the crime ... What is important at the selection stage is an individualized determination on the basis of the character of the individual and the circumstances of the crime.
Williams v. Lynaugh,
VI
For the forgoing reasons, we conclude that Boyd has failed to make a substantial showing of the denial of a federal right. Therefore, we DENY his request for a CPC.
Notes
. For a fuller exposition of the facts of the case, see
Boyd v. State,
. At the time, Article 37.071 of the Texas Code of Criminal Procedure provided that, after finding a defendant guilty, a jury must decide (1) whether the conduct of the defendant that caused the death of the deceased was committed deliberately and with the reasonable expеctation that death would occur; (2) whether there is a probability that the defendant would commit criminal acts of violence that would constitute a continuing threat to society; and (3) if raised by the evidence, whether the conduct of the defendant in killing the deceased was unreasonable in response to the provocation, if any, by the deceased. If the jury found the state proved beyond a reasonable doubt that the answer to all three is yes, then the death sentence was imposed. Otherwise, life imprisonment resulted. See Tex.Code Crim. Pro. Ann. art. 37.071.
. Boyd filed his federal habeas petition on March 5, 1992, and thus the 1996 amendments to the Antiterrorism and Effective Death Penalty Act ("AEDPA”) are inapplicable to this suit.
See Lindh v. Murphy,
. Boyd did not request a special jury instruction at trial. We have stated that "in a case such as this, which was tried before
Penry
was decided, the petitioner need not have requested an instruction on mitigating evidence, nor must he have objected to the lack of such an instruction.”
Motley v. Collins,
