of the 3,000 inmates at the santa rita jail near oakland, about 10% are women. most of them live in general population units where they're free to be out of their cells and socialize several hours per day. but approximately 20 other female inmates live a far more confined life in the jail segregation unit. >> those are the people housed separately. there's one person per cell. never allowed to be two people in a cell. it can be anybody from a high-profile case, can be a safety issue, it could be somebody who does not -- i call it doesn't play well with others. they don't fit in with the general population setting. >> kelsey, you got one hour. >> all right. >> each of the women is allowed out of their cells one at a time for one hour per day. >> don't be mad because you're not out. >> kelsey erwin uses her time to make daily rounds with nearly