Someone brought up the question what item of Holly's could have been found on the roadside that was a game changer, or that might point specifically to Holly being alive or dead.
Here's a thought I had:
What if someone found a prescription bottle with pills in it....and even though it had been laying out in the elements part of the name was still available "Holl" or "obo" or something....Think about it, a prescription would be something that a person might keep in their purse, depending on how often a day they had to take it.
If you knew someone had a prescription they took once each day and you see that the prescription was for 30 pills and was last filled on the 1st, then on the 13th you would expect there to be around 17 pills left....so if you find a bottle with 17 pills in it, it could suggest certain things and if you found the bottle with only 8 pills left, you might draw other conclusions..... I'm not saying that's what it is, but it's one example of the type of stuff they could find or could have found that I hadn't really heard mentioned.