Ohio Supreme Court July 20, 1977, Nos. 76-1150 and 76-1318 (State v. Humphries)

Sweeney, J.

In Ohio, the common-law rule has been that in a criminal case the defendant has the burden of proving the affirmative defense of insanity by a preponderance of the evidence to overcome the presumption that he is sane.1

However, effective January 1, 1974, R. 0. 2901.