I don't know much about Georgia or it's politics, but why is this possible?
They are showing his photos on CNN right now, and the world is waiting for the announcement he is dead. It's obvious this is highly controversial, yet the state isn't even batting an eye over taking his life.
As best I can tell, the problem came down to the law. The law lays out the procedures, and they where followed. Once convicted, the standard of proof is changed, and there are rules for what can get him new trials, and what can get his case overturned, and so on.
The ghost of Jack Kevorkian for President's Physician: 2016
I love how, in scary movies, the person yells out, "Hello?" As if the bad guy is gonna be like, "Yeah, I'm in the kitchen! Want a sandwich?"