Edited sentence: Lucas also claimed himself to being the "worst mass murderer in history", having claimed to have killed more than 300 people.The commutation reflects the growing and persistent doubts that Lucas was guilty of any murders other than that of his mother, for which he was convicted earlier in life, and this "post-conviction reasonable doubt that Lucas murdered anyone" has been cited as the primary reason for the commutation's approval.The true reality at the heart of the history of the case may never be completely and fully known