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.

In Central City, an increasingly familiar scene played out as rifle-toting state troopers and armored vehicles arrived as the sun set in an attempt to flush out one of five remaining fugitives.

Most recently, a fellow inmate was charged with collaborating with the escapees from within the New Orleans jail.