McCleskey v. Kemp
The Supreme Court upheld Warren McCleskey's death sentence, ruling that a sophisticated statistical study showing wide racial disparities in who receives the death penalty in Georgia was not enough, by itself, to prove that his individual sentence was unconstitutional.
The decision meant that stark, well-documented statistical patterns of racial disparity in capital sentencing could not succeed as a constitutional challenge unless a defendant could show that racial bias infected the decisions in his own specific case, a standard critics said was nearly impossible to meet.
“At most, the Baldus study indicates a discrepancy that appears to correlate with race. Apparent disparities in sentencing are an inevitable part of our criminal justice system.”
The majority's characterization of what the statistical study could and could not prove.
How it got here: A federal district court and the en banc Eleventh Circuit rejected McCleskey's habeas claims based on the Baldus study; the Supreme Court granted certiorari to review that ruling.
The Case in Depth
What happened
Warren McCleskey, a Black man, was convicted of murdering a white police officer during an armed robbery of a furniture store in Georgia and sentenced to death. In later federal habeas proceedings, he introduced the Baldus study, a statistical analysis of over 2,000 Georgia murder cases showing that defendants who killed white victims, especially Black defendants, were far more likely to receive death sentences than others.
The question before the Court
Could a detailed statistical study showing that Georgia juries were far more likely to sentence killers of white victims to death prove that one Black death-row inmate's own sentence was unconstitutional?
The Court's answer
No — the Court ruled that the Baldus study's statistical showing of racial disparities in Georgia's death penalty system was not enough, by itself, to prove that McCleskey's own death sentence was unconstitutional. Under the Equal Protection Clause, a defendant must show that the decisionmakers in his particular case acted with discriminatory purpose, and McCleskey offered no evidence specific to his own prosecution beyond the statewide statistics.
On the Eighth Amendment claim, the Court found that Georgia's capital sentencing system contained the structural safeguards required since Furman v. Georgia and Gregg v. Georgia — a bifurcated trial, required aggravating circumstances, and mandatory appellate review — and that the discretion inherent in jury and prosecutorial decisionmaking, while capable of producing disparities, did not amount to the kind of constitutionally intolerable risk of arbitrariness the study needed to establish.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
The ruling closed off statistics-based challenges to racial disparities in the death penalty nationwide, meaning capital defendants generally cannot use broad sentencing-pattern data alone to win relief. It shaped how courts treat proof of discrimination throughout the criminal justice system and left the burden on defendants to show bias in their own case specifically.
What changes now
The decision was final on the merits, leaving McCleskey's death sentence intact and closing off statistical-pattern arguments as a standalone basis for challenging capital sentences under the Constitution. McCleskey was later executed in 1991 after further unsuccessful appeals not covered by this opinion. The ruling continued to govern how lower courts assess claims that racial bias, rather than case-specific facts, drove a particular death sentence.
What this does not decide
The Court did not decide that race plays no role in capital sentencing, and it assumed the Baldus study's statistical validity throughout. It held only that this kind of general statistical showing, without evidence tied to McCleskey's own case, does not by itself prove a constitutional violation in his sentence.
Concurrences and dissents
Dissent — Justice Brennan
“Since, according to Professor Baldus, we cannot say "to a moral certainty" that race influenced a decision, ante, at 308, n. 29, we can identify only "a likelihood that a particular factor entered into some decisions,"”Brennan's critique of how the majority downplayed the strength of the statistical evidence.
Justice Brennan argued the Eighth Amendment focuses on the risk of arbitrary punishment, not proof of actual bias in a specific case, and that the Baldus study showed an intolerably high risk that race influenced McCleskey's sentence. He traced Georgia's historical dual system of race-based criminal law and argued the majority's fears about opening the door to other claims should not override the powerful statistical and historical evidence presented.
Dissent — Justice Blackmun
Justice Blackmun focused on the Fourteenth Amendment claim, arguing the majority wrongly limited its analysis to just the jury and legislature while ignoring the prosecutor's central role in deciding whether to seek death. He argued McCleskey had established a prima facie case of discrimination under existing equal protection frameworks that the State failed to rebut.
Dissent — Justice Stevens
Justice Stevens argued the Baldus study showed that in the most aggravated cases the death penalty was applied consistently regardless of race, suggesting Georgia could narrow the class of death-eligible defendants to eliminate the racial disparity rather than abandon capital punishment altogether. He would have remanded for further proceedings on the study's validity and its application to McCleskey's specific case.
How the Court got there
The legal reasoning, step by step
- The Court held that an equal protection claim requires proof of purposeful discrimination that actually affected the decisionmakers in the defendant's own case, not just a statistical pattern across many cases.
- Statistical proof of discrimination has been accepted in narrow settings like jury-selection and workplace discrimination cases, but the Court found capital sentencing different because each verdict comes from a unique jury weighing countless case-specific factors, making it much harder to draw an inference of intentional bias from statewide numbers.
- The Court also stressed that jurors cannot be questioned about their reasoning and prosecutors cannot practically be forced to justify individual charging decisions years later, so there was no realistic way for the State to rebut the study even if required to.
- Turning to the Eighth Amendment, the Court reviewed its post-Furman v. Georgia line of cases (the 1972 decision striking down then-existing death penalty schemes as too arbitrary) and concluded that Georgia's system, with its aggravating-circumstance findings, mitigating evidence rules, and mandatory appellate review, contained the structural safeguards Furman and Gregg v. Georgia required.
- Because the Baldus study showed at most a statistical correlation and discretion is a built-in and generally beneficial feature of jury and prosecutorial decisionmaking, the Court concluded the study did not show a constitutionally significant risk that race determined the outcome in McCleskey's particular case.
- The Court also reasoned that accepting McCleskey's claim would logically extend to challenges based on other statistical correlations throughout the criminal justice system, and that such broad questions about how discretion is exercised are better addressed by legislatures than by courts.
Doctrinal impact
Cases affected by this decision
Reaffirms Furman v. Georgia (408 U.S. 238)
The Court relied on Furman's ban on arbitrary death sentencing as the framework for evaluating Georgia's safeguards.
Reaffirms Gregg v. Georgia (428 U.S. 153)
The Court treated Gregg's approval of Georgia's guided-discretion death penalty system as controlling and still valid.