Deep in the Bible Belt, an ancient Eastern practice is taking root in the unlikeliest of places: Alabama’s highest security prison.

Behind a double electric fence and layers of locked doorways, Alabama’s most violent and mentally unstable prisoners are incarcerated in the William E. Donaldson Correctional Facility outside Birmingham. Many of them are here to stay. The prison has 24 death row cells, and about a third of the approximately 1,500 prisoners are lifers with no chance of parole.

“You’re dealing with the worst offenses that have been committed by humans in the state of Alabama,” says Gary Hetzel, the warden at Donaldson.

The lockup has a history of inmate stabbings, deaths and suicides …

Deep inside Alabama’s toughest prison, an overcrowded lockup with a reputation for mayhem, convicted murderers, robbers and sex offenders gather in a small room. Eyes closed, they sit silently with their thoughts and consciences.