(1) Unless and until it is shifted, the party claiming that a person is guilty of crime or wrongdoing has the burden of persuasion on that issue.

(2) Unless and until it is shifted, the party claiming that a person did not exercise a requisite degree of care has the burden of persuasion on that issue.

(3) Unless and until it is shifted, the party claiming that any person, including himself, is or was insane or of unsound mind has the burden of persuasion on that issue.