Last year, on a warm Saturday evening in Boise, Idaho, Timmy Earl Kinner Jr. walked into the birthday party of a family. In a random attack, he stabbed nine people, including the birthday girl Ruya Kadir. That little girl died at just three years old.
Click 'play' to hear the first part of our series on the insanity defense.
Click 'play' to hear the second part of our series on the insanity defense.