. >> my name is john mathis. i've been in san quentin for 35 years. came in when i was 19 years old. we got everybody -- >> i admitted to my crimes. i confessed. i pled guilty. i said from the outset that i deserved it. >> my name is charles smith. 46 years old. i've been convicted of four gang murders. i was sentenced to death. >> step away, please -- >> i've been here 15 years at san quentin. 35 years since that. >> i was an evil person. no other way to put it, you know. i didn't care for other people's lives. i was an adult, and i chose to do what i did. >> you damaged a lot of people when you do crimes like the ones i did, robbery. how do you get that back, you know? you don't. you acknowledge that but something that hurt someone. and it hurts. it tears you up, too, because you know that you were 19 years old. when you try not to make an excuse for it, that's where you really take on a lot of pain and stuff. >> there is such a thing as evil. some people are evil. >> are you no longer evil? >> yes, i'm no longer evil. >> what changed? what flipped