>> the dynamics of the population were changing. t they were becoming more violent we were having more gang vi incidents. so we had begun to compartmentalize the facility and restrict the offender movement in the facility.r >> when travis trani took charge of limon in 2008, he became the youngest warden in colorado, an oversaw the implementation of several new policies at a prison plagued by violence. the restrictions on movement were among the toughest. inmates from the six different housing units could no longer re freely move throughout the prison.co virtually all of their interactions would now only be with those in their own units. >> we identified the need to start having better control of i the facility and isolating the units and restricting their fa interaction with each other in the courtyard and recreation and dining halls. so we isolated to where only one unit can access those areas at a time. >> everybody's separated from everybody now. so see, when you separate dogs like that, then they bark.