So I was thinking if the dogs were correct and both of their smells were detected it means they were alive when they abandon the vehicle and of course someone else had to be involve or two people had to be involve if they were taken against their will. Anyways my point is maybe Jon asked Audrey for road services assistance but then once again Jon didnt have internet on the road to use his cellphone. So maybe they can track down any incoming calls or messages from the cellphone provider because of course we know her phone was not found. Anyways my other point is that in order to carry two bodies (one big one and one small) it takes more than one person and they have to be strong my other point is they took them to a location where they could easily get ride of the bodies or just leave them there without any suspicion or audience.