On July 21, 1983, petitioner Earline Martin and her husband, Walter Martin, argued over grocery money. Petitioner claimed that her husband struck her in the head during the argument. Petitioner's version of what then transpired was that she went upstairs, put on a robe, and later came back down with her husband's gun which she intended to dispose of. Her husband saw something in her hand and questioned her about it. He came at her, and she lost her head and fired the gun at him. Five or six shots were fired, three of them striking and killing Mr. Martin.
She was charged with and tried for aggravated murder. She pleaded self-defense and testified in her own defense. The judge charged the jury with respect to the elements of the crime and of self-defense and rejected petitioner's Due Process Clause challenge to the charge placing on her the burden of proving self-defense. The jury found her guilty.
Both the Ohio Court of Appeals and the Supreme Court of Ohio affirmed the conviction. Both rejected the constitutional challenge to the instruction requiring petitioner to prove self-defense. The latter court, relying upon Patterson v. New York, concluded that the State was required to prove the three elements of aggravated murder but that Patterson did not require it to disprove self-defense. The court said, "the state proved beyond a reasonable doubt that appellant purposely, and with prior calculation and design, caused the death of her husband. Appellant did not dispute the existence of these elements, but rather sought to justify her actions on grounds she acted in self defense." The Supreme Court granted certiorari, 475 U.S. 1119 (1986).