. >> two years ago officer karen talley was brutally assaulted and nearly died. y is her first day back behind the walls of "b" cell house. karen originally started work at the prison in 1997. >> in the michigan city area there's not a lot of jobs and i had two small children, and i had to find a job that could pay the bills, you know, and be able to support them. >> at the time officer talley was responsible for supervising "b" cell house, an important part of her job was securing the inmates back in their cells with a system called rolling of the bar, an archaic locking device left over from an earlier era. >> that day, chow lines were running late. i said, come on, guys, in your cells. if you miss roll-in, you know what happens. i figured all of them would be in. i rolled the bar. bigger than anything, here are three of them didn't make it. so i went down and i started at the end and worked my way up, the last cell that missed roll in was 424. i locked his door, went to 418. locked his door. went to the next cell, 410. i said, come on, go on in your cell. he sa