>> among the nation's most notorious institutions, san quentin state prison. our cameras spent months documenting life on the inside where gangs, drugs and sheer boredom make up a violent mix. this is "lockup: san quentin, extended stay." >> in america's prisons, violence is a way of life. san quentin, the oldest prison in california, has one of the longest histories of violence. >> there's fistfights going on, there's guys getting beat up pretty good. >> whether it's an inmate fresh off the street -- >> i refuse to get disrespected by anybody. >> a gang dropout in protective custody. >> it happened a couple of days ago so -- >> or an officer trying to maintain order. >> he was going for the jugular but he just missed. >> they've all fallen victim to violent attacks. in the three months we were at san quentin, we saw our fair share. ♪ for the ruler of all evil i pray to god i don't die for the wrong people ♪ >> administrative segregation, otherwise known as ad seg, is a unit mainly reserved for the worst of the worst offenders at san quentin. >> it's a place wh

. >> among the nation's most notorious institutions, san quentin state prison.onths documenting life on the inside where gangs, drugs, and sheer boredom makeup a violent mix. this is lock up san quentin, extended stay.

>> among the nation as most notorious institutions, san quentin state prison. our cameras spent months documenting life on the inside. where gangs, drugs, and sheer boredom make up a violent mix. this is "lockup san quentin: extended stay." >> san quentin is home to more than 3,000 inmates ranging from the most violent offenders in california. >> i'll rob you in a minute. don't get me wrong. >> i pulled a gun on this man and shot him six times in his chest. >> to the all too common parole violators flooding the system. >> i do drugs. that's my violation. >> the overpopulated san quentin serves as the reception center for 17 counties in california. >> there's 384 inmates in this gym. right now i have six staff members. >> it's forced to house a dangerous mix of high and low-risk inmates. >> you got the drugs, you got the inmates to manufacture alcohol, you got the gangs, the weapons. so it can be real dangerous at times. ♪ >> i've been a pretty successful robber. >> level 4 inmates, the worst in california, are housed at san quentin while awaiting permanent tran

he now waits transfer to california's notorious san quentin state prison just 40 miles west of santantil he leaves, he will be in the jail's most restrictive high security housing unit for an alleged act of violence that occurred two months earlier. this time the victim was another inmate, robert haynes. >> my face, i couldn't believe it. >> beautiful face. so sad, man. surprised, man. >> charged with pimping, pandering and human trafficking to which he has pled not guilty, haynes says he had a friendly relationship with white. >> he was cool though. i didn't really have no problems with him till that day the day he lost a bet. >> according to haynes, white lost a bet with him over a football game. the wager was two $1 containers of instant soup from the jail commissary. >> he didn't want to give it up. then he did. when he gave it up, he started mouthing. i started mouthing him back. come holler at me in the cell. >> hanes says when he stepped inside the cell, white lunged at him. >> sliced me in the face with a razor. i didn't even see the razor in his hand, he did it so fast. i gu

he now waits transfer to california's notorious san quentin state prison just 40 miles west of santantil he leaves, he will be in the jail's most restrictive high security housing unit for an alleged act of violence that occurred two months earlier. this time the victim was another inmate, robert haynes. >> my face, i couldn't believe it. >> beautiful face. so sad, man. surprised, man. >> charged with pimping, pandering and human trafficking to which he has pled not guilty, haynes says he had a friendly relationship with white. >> he was cool though. i didn't really have no problems with him till that day the day he lost a bet. >> according to haynes, white lost a bet with him over a football game. the wager was two $1 containers of instant soup from the jail commissary. >> he didn't want to give it up. then he did. when he gave it up, he started mouthing. i started mouthing him back. come holler at me in the cell. >> hanes says when he stepped inside the cell, white lunged at him. >> sliced me in the face with a razor. i didn't even see the razor in his hand, he did it so fast. i gu

>> among the nation's most notorious institutions, san quentin state prison.life on the inside where gangs, drugs and sheer boredom make up a violent mix. this is "lockup: san quentin, extended stay." >> in america's is

san quentin. they've undergone a unique coding program to prepare them for the job world when they're released. >> a convicted killer is now designing software. >> at the state prison, behind the barbed wire, [applause], a graduation ceremony takes place. and 18 inmates take a computer coding program to they're more employable after prison. meet one of the star pupils.. i've been in prison for 17 years for murder. >> he and another inmate designed a software program for airbnb. >> it's one of the first projects for airbnb, it's a social media dashboard. >> i didn't have any experience but i found something i loved doing and something i can see myself doing after prison. >> the idea behind it, not just to prepare inmates for a job but a career. >> the program is run by the last mile, eight hours a day four days a week, volunteers come in from silicon valley to help and 50 inmates have been trained as coders and three are working in high-tech on the outside. >> it's a template that can be replicated. >> we're trying to give back to the community. >> they've done an incredible job and it's a great opportunity. >> this program graduate is serving time for armed robbery

state seal. it was forged by inmate welders at san quentin from 1952. of the jails in prisonal trading, welding has always been aamong the most common about. 20 miles south of sacramento's downtown jail sits its branch facility. it's here inmate welders carry on the tradition. >> you get that 9:00 to 5:00 job feeling like you're back on the streets working a job. i've been on a hiatus the last ten years doing nothing. at 52, i guess it's time i start doing what i should have probably been doing years ago. >> overton is serving one year on his laters conviction, possession of a firearm by a felon. >> i haven't been in this jail since '90 something. i thought i would never see the inside of this one again. >> he served time in jail several times over the past 25 years on multiple counts of forgery, identity theft and drug possession. >> i've got the experience of welding. keep a job and get money put away finally instead of screwing around like an idiot like i have been a few years. >> the more experienced inmates take on jobs for outside clients such as this custom made steel

san quentin prison. he was sentenced to death. erin? >> thank you very much, sara. "out front" now, a california statedin de le leon, democrat, and former congressman tom tancredo. senator, let me start with the question that jameel shaw put. he says he blames people who support sanctuary cities for his son's death. you support those cities. you are in l.a. you are an elected representative. what do you say to him? >> my heart goes out to the shaw fami family. it was a tragic death. the individual who killed his son is a bad person and is getting what he deserves, no doubt, being in prison in san quentin. i can say that the term sanctuary cities is nebulous. it means different things to different people. on the far right, it's a volatile political term. on the left, it's somewhat misleading. there's no such thing as an invisible theeld or if you're an undocumented immigrant you can run under that shield or behind that shield and you're protected. the reality is that immigration law is enforced by a federal immigration authorities, homeland security, and i.c.e., and no one can protect you from that. wh