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.

An Orleans Justice Center inmate, who was not one of the 10 to escape last week, is facing new charges and accused of helping the others in the jailbreak, Louisiana