Martin v. Ohio

The Ohio Code provides that “[e]very person accused of an offense is presumed innocent until proven guilty beyond a reasonable doubt, and the burden of proof for all elements of the offense is upon the prosecution. The burden of going forward with the evidence of an affirmative defense, and the burden of proof by a preponderance of the evidence, for an affirmative defense, is upon the accused.” Ohio Rev. Code Ann. §2901.05(A)(1982). An affirmative defense is one involving “an excuse or justification peculiarly within the knowledge of the accused, on which he can fairly be required to adduce…