I think the top picture of the detective spraying the footprints is looking east as the fenceline is on the north. So there are 2 tapelines: 1 on the east(which DR said he could not get his car through but had to drive on the grass in the ditch) and the other tapeline on the west side of the pavement. You can also see the first pole at the abduction site. That pole is not there today so the tracks/prints were about 40 yards long. It appears to me in the detective picture there are multiple tire tracks and one of the tracks appears to be curved. I agree, one assumes this whole stretch of road would have been analyzed for tracks/prints but it has always bothered me that the detective is creating another set of prints himself.