Personally, this part of the whole case is what is the most chilling.
This is another piece of evidence that the murder of Sylvia Likens was premeditated.
But I might be wrong on this opinion. But the only reason why Sylvia was going to be dumped in the woods was to make it look like a gang of boys had beaten her. This was in order for the Ban clan to wipe their hands clean of any wrongdoing, or murder if Sylvia were to die, which she did. I think Gert knew this, and didn't want to be suspected. They wanted to act like Sylvia had just run off. So rather than find Sylvia's body in the house, they rather have her either never found at all, or found dumped off in the woods.
Killers do this so that the victim will not be found. It's the most sickening aspect of murder there is. All too often these days we find out that some missing persons were actually killed, and their bodies are usually found in fields or wooded areas. This is why police searching for missing persons use cadaver dogs to sniff out the bodies if they suspect the individual is dead. But, you have to have clear evidence that there was a murder. It's the worst thing for a murderer to do, because then that leaves the family no way of closure. Take the recent murder of 10 year old Jessica Ridgeway. Her killer disposed of her body in hopes that she would never be found, so he wouldn't be charged with the crime. Jessica's family was frantically searching for her. They would never have known what really happened if Jessica's body had not been found. I look at posters of missing children and women, and I wonder what might have really happened to them. Everyone needs answers, and I'm glad in this case the evidence was all there in plain sight.
I think Sylvia tried to run when she heard about the Jimmy Forest plan, because she must have known that was her death sentence. She didn't want to never be found, or never get help. If I were Sylvia, I would have done the same thing, because there's no way I would go out without a proper burial, or without leaving evidence as to who was responsible. But I think even if Sylvia had been dumped as the Bans planned, Jenny would have told everything. What scares me, is what would have happened to Jenny if the plan went through. Which makes me also wonder if they might have threatened Jenny if she told.