when we shot our "extended stay" series there. but san quentin had one program designed to discourage troubled teens from ever joining its ranks in the future. >> okay, gentlemen. >> through the squires program, selected inmates shared their experiences with teenagers who had already had run-ins with the law. >> okay last person close the gate. >> what we need you to understand, you're in san quentin this morning. you're in a place that no kid should ever want to be in. you should be out playing somewhere in a park. but you're here because of something you did. >> what's your nickname? >> angel. >> angel? >> yeah. >> okay, how old are you? >> 19. >> miguel. >> okay. >> i'm 16. >> jonathan. i'm 16, too. >> what you want to know, that this is your life, man. you have an opportunity to leave out of this place and never come back. >> let me introduce myself to you guys. my name is david. i'm about to be 25 years old in a few more months.