Kansas v. Marsh
The Supreme Court upheld a Kansas law requiring a death sentence whenever a jury finds that the reasons favoring death and the reasons favoring leniency are perfectly balanced, rejecting the argument that this creates an unconstitutional thumb on the scale toward death.
The 5-4 decision keeps in place capital sentencing rules in Kansas and similar states, reinforcing that states have wide latitude to decide how juries weigh aggravating and mitigating evidence in death penalty cases.
“Weighing is not an end; it is merely a means to reaching a decision.”
The majority explains why a jury finding of equal balance is still a genuine decision for death.
How it got here: The Kansas Supreme Court declared the state's death penalty statute facially unconstitutional and ordered a new trial on some counts; Kansas sought Supreme Court review of that ruling.
The Case in Depth
What happened
Michael Lee Marsh II broke into a woman's home, killed her and her toddler daughter, and set the house on fire. A Kansas jury convicted him of capital murder and other crimes and, applying the state's death penalty law, found that aggravating factors were not outweighed by mitigating ones, resulting in a death sentence for the child's murder and a life sentence for the mother's murder.
The question before the Court
If a jury finds that the reasons for and against a death sentence are exactly equal, can a state law require the jury to choose death anyway?
Why it matters
Kansas and other states with similar 'tie-goes-to-death' sentencing rules can continue enforcing them without redesigning their capital sentencing statutes. Defendants facing the death penalty in these jurisdictions cannot argue that a tied verdict on aggravating and mitigating factors should instead result in a life sentence. The ruling also reflects a sharp internal debate among the Justices over the reliability of capital verdicts generally.
What changes now
The case returns to the Kansas courts, where Marsh will be retried on the capital murder and aggravated arson charges after evidentiary errors identified by the Kansas Supreme Court. Because the Supreme Court reversed the ruling that struck down the death penalty statute, Kansas may continue applying its capital sentencing law, including the equipoise rule, in this and future capital cases. The decision is a final merits ruling, not a temporary order.
What this does not decide
The Court's holding is limited to whether the Constitution permits a state to make death the outcome when aggravating and mitigating evidence are exactly balanced; it does not address the accuracy of capital verdicts generally, wrongful convictions, or DNA-related innocence claims, which the majority and Justice Scalia's concurrence explicitly said were beyond the scope of the case.
Concurrences and dissents
Concurrence — Justice Scalia
Justice Scalia joined the Court's opinion in full but wrote separately to defend the Court's decision to grant review of a state ruling that favored a criminal defendant, arguing that ensuring uniform federal law justifies such review regardless of which side loses below. He also mounted an extended attack on Justice Souter's dissent, arguing that claims of wrongful executions lack verified support and that most death-sentence reversals involve legal error, not actual innocence.
Dissent — Justice Stevens
Justice Stevens argued that the Court should never have taken the case at all, since Kansas's own high court was entitled to give its citizens more protection than the federal Constitution requires, and no other state's law was affected by that ruling. He also disputed that Walton v. Arizona actually resolved the equipoise question, since Justice Blackmun's Walton dissent, which Stevens joined, never found that the plurality opinion addressed a tied-evidence scenario.
Dissent — Justice Souter
“A law that requires execution when the case for aggravation has failed to convince the sentencing jury is morally absurd”The dissent's core objection to Kansas's rule that ties go to death.
Justice Souter argued that a rule mandating death whenever aggravating and mitigating evidence are exactly balanced is not a reasoned moral judgment but a mechanical tie-breaker that guarantees death precisely when the jury is most uncertain the defendant deserves it. He pointed to a growing body of exoneration data as reason for special caution in capital sentencing rules that push doubtful cases toward death rather than life.
How the Court got there
The legal reasoning, step by step
- The Court first confirmed it had authority to review the case: because the Kansas Supreme Court's ruling that the death penalty law is unconstitutional was final and could never otherwise reach the Supreme Court, review was proper even though Marsh's retrial was still pending.
- The Court then found that the Kansas Supreme Court's decision rested on federal constitutional grounds (the Eighth and Fourteenth Amendments), not on independent state law, so there was no barrier to federal review.
- Turning to the merits, the Court treated its earlier decision in Walton v. Arizona -- which upheld a similar Arizona law making death the default outcome unless mitigating evidence outweighed aggravating evidence -- as controlling, because the Kansas and Arizona statutes worked in substantially the same way.
- Even setting Walton aside, the Court applied the general framework from Furman v. Georgia and Gregg v. Georgia, under which a capital sentencing system is constitutional if it rationally narrows who is eligible for death and lets the jury make an individualized decision based on the defendant's record and the crime.
- The Court concluded that Kansas's system satisfies both requirements: it requires proof of specific aggravating circumstances before death is even possible, and it lets jurors consider any evidence in mitigation, including mercy, without restricting how they weigh it.
- Because the statute never forces a defendant to disprove that mitigating evidence outweighs aggravating evidence, and defaults to life imprisonment unless the State proves otherwise beyond a reasonable doubt, the Court held that an equal balance is itself a reasoned decision for death rather than an automatic or presumed one.
Doctrinal impact
Cases affected by this decision
Reaffirms Walton v. Arizona (497 U.S. 639)
The Court treated Walton's approval of Arizona's similar death-penalty weighing scheme as controlling authority here.
Reaffirms Boyde v. California (494 U.S. 370)
The Court relied on Boyde's approval of mandatory death-sentencing language as long as mitigating evidence can be considered.
Reaffirms Blystone v. Pennsylvania (494 U.S. 299)
The Court relied on Blystone's holding that mandatory weighing language does not make a death sentence unconstitutional.