Guatemalan prisons are overcrowded and in many, prisoners have taken control of many of the day-to-day running of the jails.

BBC: Guatemala prison director 'killed by prison gang'

A. interrogators, under great pressure to produce information, assume that the prisoners under their control must be guilty of something.

NEWYORKER: Taxi to the Dark Side

To restore control, prison officials decided to move the prisoners in Camp 6 out of a communal area, where they eat together and freely associate for most of the day, into single cells from which they are released for two hours a day for recreation.

WSJ: US military defends Guantanamo prison raid

The report claimed there was too much emphasis on security and control at the prison and identified a need to focus "much more on the rehabilitation and resettlement of prisoners".

BBC: Damning report on jail conditions