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.

More than a decade before the recent New Orleans jailbreak, the city's lawless lockup went viral in a series of videos showing inmates chugging Budweiser, snorting drugs, gambling with handfuls of cash and ejecting bullets from a handgun.