Societies have used some form of the insanity defense throughout history to protect people who have a mental illness. But it’s not always easy to convince a jury that someone didn’t know right from wrong. Here are 10 of the world’s most notable insanity defenses.
Ask a card-carrying member of the NRA and you'll get one answer. Ask a participant in the Million Mom March and you'll get another. Ask us and you'll get the research that underlies this controversial topic.