Martin v. Ohio

Background

Earline Martin was tried in Ohio for the aggravated murder of her husband after an argument about grocery money. She admitted shooting him — five or six shots were fired, three of which killed him — but said she acted in self‑defense. Ohio law defines aggravated murder as purposely killing with “prior calculation and design,” and Ohio treats self‑defense as an affirmative defense that the defendant must prove by a preponderance of the evidence. The jury was instructed accordingly and convicted Martin; Ohio courts affirmed.

Reasoning

The Court, in an opinion by Justice White, asked whether the Fourteenth Amendment forbids a State from placing the burden of proving self‑defense on the defendant in an aggravated murder case. Relying on earlier cases (including Patterson and Winship), the Court concluded Ohio did not violate due process because the State still had to prove each element of aggravated murder beyond a reasonable doubt and the jury could consider all evidence, including the defendant’s, when deciding whether a reasonable doubt existed.

Real world impact

The ruling means Ohio and similar States may require defendants to prove self‑defense without automatically violating the Constitution, so convictions can stand even when defense evidence overlaps with elements of the offense. The opinion notes most States have shifted burdens differently, but declines to declare those practices unconstitutional. This is not a later, final change in state law — it affirms Ohio’s allocation of burdens for this case.

Dissents or concurrances

Justice Powell, joined by Justices Brennan and Marshall (and partly Blackmun), dissented, arguing the burden shift risks convicting defendants despite reasonable doubt and that precedent (Winship, Mullaney) supports reversing the conviction.