I am attaching a map of possible vehicle sightings and the approximate shoe location that afternoon on April 27th. I suspect that he had already selected or had in mind a very private area to take Marianne to considering he did not have a van and did not take her back to his home. He had even parked his car on the side of the road near the school in the direction of the Rattlesnake Conservation area. As well, he would likely have left the area as soon as possible as he would have had to assume that as soon as Marianne did not return home, alarm bells would be raised and he knew that he and his car were seen by several people. He could not have assumed when they would go searching or when police would be arriving. It would have taken approximately ten minutes for Mr. X to get to Bell Line Road where the vehicle was apparently seen parked. Wherever they went in that location - if that was indeed them - could be where she was left, possibly above ground but heavily concealed somehow; it would have been a risk to come out carrying a body exiting the area or if encountering a hiker or to have one in his vehicle to transport to a second location (although he may have taken such a risk). There are apparently small caves in this area as well. He appeared to have already been quite planned in this abduction, so it might fall in line that he took one of her shoes to place up further up on the side of the highway, in full view of motorists in order to cause a distraction for searchers so that she would not be found so quickly therefore putting more time between him and the discovery of any remains. If he indeed put the shoe on the side of the highway she was probably deceased and concealed by that time. Bear in mind, this theory just assumes he had to be in and out of the area very quickly and did not return to the area the next day to place it. I think, barring no incidents with his car, he then got out of the area and headed back home possibly on rural routes with the potential for limited sightings of him. The sighting of him cleaning out his car may not have meant - as I had first imagined - that he'd been out all night, but that instead, news of the car's description had hit the news and police were searching for it; he was cleaning it the best he could to make it appear 'new-like' or in pristine condition and no one had been in it except for himself.