I voted "yes" but I'm really not too sure. It really depends on a lot of factors. At this point they are two very broken people, and both need a lot of therapy to mend all that's gone wrong. The best thing they could do is to get into some sort of therapy.
I think George has gotten to the point where he will no longer support Casey. I'm sure that as her father he doesn't want her to get the death penalty, but he's been beaten down and can no longer do anything beyond self preservation.
Cindy continues to support Casey. Unless she can accept the reality of what her daughter did, and learn to turn her focus to her other family members, she's going to create a gulf between herself and others. Casey may continue to be a source of contention between George and Cindy.
Casey? She may continue to refuse visits from her family. I think she sees her parents and the ones to blame for all that's happened to her. If she refuses to see her parents, that might be a good thing for George and Cindy.
The best thing George and Cindy could do is sell that house and move away from Orlando. They've got family in other areas of Florida and perhaps they need to move closer to them. A move away from Orlando would give them a new start.
They need to get jobs, but that might be difficult because of their notoriety.
I guess time will tell if George and Cindy will stay together, heal, and change their ways.