The 10 inmates who broke out of a New Orleans jail in a stunning overnight escape last week used electric hair trimmers with multiple clipper blades to help cut their way through the cell walls, a source with direct knowledge of the investigation told CNN.

When 10 inmates busted out of the Orleans Justice Center last week, the world was shocked. New Orleanians? Not so much. For those who live in the Louisiana city, the jail—and its accompanying dysfunction—is difficult to ignore.