From Sentencing Law and Policy:
Everyone agrees Andre Thomas is crazy. In 2004, he cut out the hearts of his wife and her two children and pocketed them. Before his murder trial, he plucked out his right eye. In January, while on death row, he ripped out his other eye and swallowed it.
As it happens, Thomas was going to suggest a Potter Stewart standard for determining insanity. Except that, well, he'd already ripped out and eaten his own eyes.