. >> two years ago officer karen talley was brutally assaulted and nearly died. today 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.