Well, I caved in and drove down his street the other day. Glad I did in a way, because I feel that the houses are so close together that any commotion could have been overheard. Any altercation in the driveway or roadway could easily be seen by a dozen houses. I just don't think that a car pulling up out front or in the driveway would have gone unnoticed if a neighbor happened to be up and wondered why there was activity in the middle of the night. But, it could happen, I know.
Also, along his block, you go out your back door, and just beyond your manicured back yard is a stand of trees, underbrush ---woods, as I would call it. It is not wide, but long, spanning several households. Someone could easily hide in the woods to enter anyone's house from there. There is a street along the woods that runs parallel to his street, and then various open spaces or more words on the other side of that street. There are lots of clumps of woods in walking distance, but I didn't see any major hills, cliffs, streams, lakes, etc. that an unaware person could fall off of or into. I am leaning to a theory that something happened inside the house, and he was moved into a vehicle that was inside the attached garage and taken elsewhere. Who did it, I will leave open. I am beyond crazy over this. It still makes no sense.