Jul 13 2020 0 The insanity defense refers to a defense that a defendant can plead in a criminal trial. In an insanity defense, the defendant admits the action but asserts a lack of culpability based on mental illness.Post navigationPrevious PostPrevious Inadmissible EvidenceNext PostNext Plea bargainLeave a Reply Cancel replyYour email address will not be published. Required fields are marked *CommentName * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.