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.

Authorities said Tra'Von Johnson, 22, who escaped from the Tangipahoa Parish Jail about a year ago, had accomplished the same feat again.

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