Mike Poulos is a man on a mission. When he was hired in mid-2005 as warden of the California Institution for Men, Poulos' marching orders were clear: Fix the prison. So far, he hasn't shied away from the challenge. "This institution has had a really strong transition into a whole new way of doing things," Poulos, 53, said during a tour of the prison in June. "We are changing the culture at CIM." It's a task simply stated, yet breathtakingly difficult. A yearlong investigation by the Daily Bulletin found that decades of mismanagement and indifference have made CIM one of...