. >> miguel perez was one of pelican bay's top drug runners on the yard.d into the thu, he has been instrumental in helping staff crack down on drug operations inside the prison. >> what soured myself on the gang life? in all honesty, i opened my eyes to see it for what it is. there's no loyalty, there's no honor, there's no respect. though they'll sell you this and make you believe this, it's not true. just because one of their family members were a part of it. i seen too many innocent people targeted that had nothing to do with the gang life. >> once a gang member decides to quit, he can leave the shu in one of two ways. remain inactive for six years, or drop out altogether. to drop out, inmates must go through a debriefing process which has three missions, first, to determine their sincerity to leave the gang. second, to identify the people who might be a threat to them, since leaving a gang is considered treason. and third, to gather information about the gang. after debriefing, the inmates learn basic education and coping skills in a 14-week program d

meanwhile, store owner miguel perez is working in his upstairs office. >> i was doing some papers andupstairs, she was scared, because she saw when this guy came in, i approached the window, the little window i have in my office. i see this guy was real close to my cashier. >> perez doesn't wait for the police to arrive. instead, as he demonstrates here, he grabs the first thing he can find to use as a weapon. >> i went to the corner of my office and i had a 2 by 4 level. i keep the level all the time in my office, because i like to work, you know, with wood. >> this guy, i don't think he has experience because he was so slow. he turned back and was picking up the money. the cashier was helping him. >> lamb is completely unaware of what's about to hit him when perez moves into position and levels him. >> and i came down and i just hit him, hit him in the neck and he fell down. >> perez has no idea what lamb has in his pocket and knows he's taking a huge risk by confronting him. it turns out, the man is believing about having a weapon. >> we can see when the police come and they say, h