it's not an unusual event. this is jail and there are dangerous people in this jail. >> but this time, these inmates, some accused of violent crimes, did something good. letters pour in for them from all over the world. >> you never seen inmates run to save an officer's life. we're in jail, committed a crime at one time or another. you know, we do have a heart, too. >> deputy moon has since retired. terrell carswell says he was well liked by everyone around the jail. >> moon was like a father to me. he helped inmates. he could deal with anybody. >> they respected this guy, and it's human nature to protect someone you respect and care about. if it weren't for the fact that dieguez got there when he did and took the action that he did, this might have had a bad ending for us. >> instead, he says, he has seen a positive change in the inmates around pod 7. >> you can see that they're holding their chests a little higher, they're walking a little taller. coming up, desperation at a