I wonder if they searched for Robert along Tower Rd (formerly known as Albrecht Road at time of Robert's disappearance) and McLeisch Rd between the relay tower and the retreat? (Both roads merge at the Sauk/Columbia County line) The 'friend' of Robert may have been driving east away from the relay tower in his own vehicle with the front plate that he'd taken off Robert's vehicle, stopped in the driveway of the retreat on McLeisch Rd around 8/8:30 pm, ransacked the house, was surprised by the woman from Mauston and by the nun, gave an excuse about looking for his friend Bob, then left going northeast on McLeisch Rd which intersects with Durward's Glen Rd (which is on the way to Baraboo). Where he was going is unknown (maybe to dispose of Robert's body), but he may have returned, took Robert's license plate off his own vehicle and tossed it into the bushes next to Robert's already-stripped car and then most likely left. I highly doubt it was Robert who spoke to the woman from Mauston. Why would he say he was looking for himself? It's very possible that the person actually was a friend of Bob. Did Bob meet a friend of his on the was to Randy's house? Whoever it was seemed to know his way around Bob's hunting area.
Robert left Madison at 5:30 pm, travel time from Madison to the retreat area is about one hour. So, from 6:30 pm to 8 pm/8:30 pm, 1.5-2 hours, that vehicle could have been stripped.
Note: Gacy was raised Catholic (he used a rosary to demonstrate how he strangled his victims) and the retreat was a Catholic retreat so maybe there's a connection there? (If Gacy was even the one involved)
Another note: Gacy drove a newer Oldsmobile at the time of his arrest. I suppose one could speculate as to when he bought it or if tires from an AMC Hornet are even interchangeable with an Olds.
MOO.