The angle is corruption and incompetence.....
Nichol's breakout was probably incompetent, but little reason to think corruption was involved except in an indirect way; that is, that corrupt organizations have within them a low incentive for excellence.
Freeman's predecessor, Jackie Barrett, was quietly trundled out of office for "mishandling" several million dollars of County funds under her pervue, right on the heels of several county prisoners (on multiple occasions) escaping from the Fulton County Jail.
Freeman hasn't changed a thing. I'd say it was a combination of the two.