>>> 21 years ago jack mcgary and an accomplice hatched an evil plan. >> it was always in the deep woods to us. >> to murder mcgary's best friend. >> he was walking around with it because i didn't know what was going to happen. >> things got desperate. >> i saw him hit him with a pair of nunchakus in the head, and i froze. and i heard cops. i started running. >> for mcgary, the horror had just begun. >> i steered away from god the whole time. ♪ ♪ ♪ >> and now comes the part which i really don't want anybody to know. >> he told me i'd become such a monster that i had to be put away. ♪ ♪ ♪ not ♪ ♪ ♪ ♪ ♪ california state prison solano has more than 6,000 inmates and each one has a secret. admitting your crime can get you killed in prison. but for six months our cameras will follow five inmates do the unthinkable, tell the truth about their crimes. this is jack mcgarey's story. >> my name is jack mcgarey doing 16 years to life for murder. i was 16 years old when i came to prison. i'm been in prison longer than i was out there. >> when jack mcgarey was taken he planned the ultimate betrayal,