Right! Not only that, but Foster was neatly laid out with the gun right next to his right hand, and there were no grass stains on his shoes as there should have been. Basic Forensic crime scene investigation 101 could only conclude that Foster was killed somewhere else then placed in the grassy area of Fort Marcy park by the perpetrator(s).
You left out the part about being driven up the overgrown drive way of an abandoned house, being carried about a hundred yards through the woods and deposited on the back side of a Ft Marcy Park gun mount at the extreme opposite end of the park from where his car was parked.