An Illinois jury found Terry Harris guilty of murdering Emma Hopkins. He was sentenced to life imprisonment. Harris sought federal habeas relief, claiming ineffective assistance of counsel. The district court denied the petition for a writ of habeas corpus, finding that Harris had procedurally defaulted the claim. For the reasons stated herein, we affirm.
BACKGROUND
On the evening of October 28, 1984, Terry Harris invited co-worker Emma Hopkins to accompany him to a forest preserve. They talked in Hopkins’ car until the forest preserve closed, at which time they drove to a factory parking lot. After engaging in sexual intercourse, Harris attempted to place a gun into the glove compartment of Hopkins’ car. The gun discharged after Hopkins grabbed the firearm. The bullet went through the floorboard of the car, injuring neither occupant. Harris, enraged at Hopkins, strangled her to death, then removed her body and hid it inside a factory vat.
The following day, the police took Harris into custody and obtained a confession. Harris also made a formal statement to an Assistant State’s Attorney. In the statement, later introduced at trial, Harris admitted that he grabbed the victim by her throat and strangled her to death.
Harris, the only witness called by defense counsel, admitted killing Hopkins, stating that he lost control when the gun fired and was afraid that it would discharge again. Harris stated that he grabbed the victim by the throat, and using two hands, strangled her, and disposed the body inside a factory vat.
The jury found Harris guilty of murder, aggravated criminal sexual assault, and aggravated kidnaping. At the sentencing hearing, Harris’ evidence in mitigation consisted of the testimony of his mother, Agnes Badgett, and his sister, Helen Brown. The two women described Harris’ upbringing and related their favorable impressions of him. Harris also testified at the hearing, apologizing for Hopkins’ death. He contended that he committed the killing unintentionally and that he was guilty only of manslaughter.
The trial judge sentenced Harris to death. The Illinois Supreme Court vacated the sentence after finding the prosecution improperly introduced victim-impact testimony.
People v. Harris,
In the meantime, Harris had obtained the services of a neuropsychologist. The neuropsychologist determined that Harris had an IQ of 76, putting him on the border of mental retardation. Harris was also evaluated as reading at a fourth grade level and suffering from organic brain (frontal lobe) damage. In light of this evaluation, Harris contended counsel’s failure to develop and introduce evidence of *668 these mental disabilities at the sentencing hearing constituted ineffective assistance of counsel. The district court denied the petition because this ineffective assistance claim had not been included in Harris’ state post-conviction petition and Harris had not proven sufficient cause to excuse that omission.
ANALYSIS
A. Sufficient Cause
In reviewing the district court’s decision to deny relief, we review issues of law de novo and issues of fact for clear error.
Dellinger v. Bowen,
There is no dispute that Harris defaulted his claim of ineffective assistance of counsel. However, Harris contends, and the State denies, that sufficient cause exists to excuse the default. Specifically, Harris argues that his pro se status, his borderline mental retardation, and his organic brain dysfunction constitute cause. The district court determined that these factors did not overcome Harris’ procedural default. We agree.
The Supreme Court has defined cause sufficient to excuse procedural default as “some objective factor external to the defense” which precludes petitioner’s ability to pursue his claim in state court.
Murray v. Carrier,
Harris contends he established cause for three reasons: (1) his pro se status; (2) his borderline mental retardation; and (3) his organic (frontal lobe) brain dysfunction. Harris cites no case law to support his argument.
1
The first element, his pro se status, need not detain us long. Harris fails to acknowledge
Barksdale v. Lane,
Harris’ second factor proffered as a basis for cause is his borderline mental retardation. He avers that the factual and legal basis for his ineffective assistance claim was unavailable to him in light of his mental deficiencies. The neuropsycholo *669 gist determined that Harris has an IQ of 76, putting him on the cusp of mental retardation. The neuropsychologist also found that Harris reads at a fourth grade level.
We have never considered whether mental illness can constitute cause for default. However,
Cawley v. DeTella,
We find the reasoning in these cases persuasive. These eases highlight the emphasis placed on the “external” nature of the impediment. Something that comes from a source within the petitioner is unlikely to qualify as an external impediment. The examples given by the Court in Murray as to what constitutes an external impediment exemplify this point. Harris’ low IQ and limited reading ability are not factors which are “external” to his defense. Finally, Harris’ mental disability claim is belied by his gainful employment as a security guard at the time of the murder, his efforts to cover up the crime, and his ability to prepare a pro se 60-page state post-conviction petition.
Harris also claims that his organic brain dysfunction constitutes cause to excuse his procedural default. The neuropsychologist opined that Harris suffers from organic brain damage. He gave no predicate facts for this opinion, which is simply asserted without more. The district court noted that Harris’ contentions about his brain dysfunction “are so conclusory that the court is uncertain they are even sufficient to require a response.” In the proceedings below, Harris stated that the neuropsychologist’s evaluation “provides the basis for ... the allegations concerning Petitioner’s mental health and functioning.” But we have noted that a habeas petitioner must “cross some threshold of plausibility before [courts] will require the state to answer.”
Dellenbach v. Hanks,
B. Evidentiary Hearing
Harris also contends that the district court should have granted him an eviden-tiary hearing to determine whether his brain dysfunction excuses his procedural default. If a petitioner has failed to develop the factual basis of a claim in state court, a federal court cannot grant relief unless the claim relies on a new rule of constitutional law, or a factual predicate that could not have been previously discovered through the exercise of due diligence. 28 U.S.C. § 2254(e)(2)(A). The petitioner must also establish that the facts underly *670 ing the claim would be sufficient to establish by clear and convincing evidence that but for constitutional error, no reasonable factfinder would have found the petitioner guilty of the underlying offense. 28 U.S.C. § 2254(e)(2)(B).
The district court correctly found that Harris failed to develop the factual basis for his ineffective assistance claim. In
(Michael Wayne) Williams v. Taylor,
Since Harris failed to develop the factual basis for his ineffective assistance of counsel claim, he must comply with § 2254(e)(2). As noted above, under § 2254(e)(2)(A), Harris must show his claim relies either on a new rule of constitutional law that was previously unavailable, or a factual predicate that could not have been previously discovered through the exercise of due diligence. Harris does not rely on a new rule of constitutional law. And, as the district court correctly noted, the factual predicate of his claim existed before he filed his habeas petition and Harris has made no showing that the factual predicate could not have been discovered through the exercise of reasonable diligence. For these reasons, Harris does not satisfy the requirements of § 2254(e)(2) and therefore the district court correctly determined Harris was not entitled to an evidentiary hearing.
CONCLUSION
The district court’s order denying the writ of habeas corpus is AffiRmed.
Notes
. Harris' reliance on
Atkins v. Virginia,
