I don't believe one word of it and I don't think George believes it either. His body language seems to get really animated when he tells these tales (shrugging shoulders, facial grimaces, etc).
Question for you about Orlando...how is the soil there? Is it fairly easy to dig a hole big enough to bury a body? I think Casey only had the shovel for about an hour.
For some reason, I'm under the impression she borrowed the shovel from the neighbor to break the lock on the shed so she could take the gas cans.