It just doesn't logistically make any sense, as far as I can tell. We know W disappeared just before FD returned (unless FM is lying, which she has not been accused of); we know that FD arrived home at 10:35 (I believe verified via his GPS and texts etc); so this old guy PS steals him, on foot.. just before FD arrives home, while PS is seeing his wife off to her bingo activity, hides him in the back under some steel.. what about all the screaming and crying? So to prevent that, he had to knock him out or kill him. For what reason?
One might presume that no matter who did something to W, there had to have been a reason/ purpose. What purpose would there be for 70-year-old PS to steal the neighbour's grandchild, carry him while presumably covering his mouth, with nobody seeing or hearing a thing even though all this activity was taking place right at roughly the same time on the street, (presuming his wife was near the door or vehicle, FM who greeted FD at the driveway, FD arriving home, AMS was reportedly out having a smoke, lawnmower man was mowing, etc.)?
Does PS hide and save W so he can later abuse him? And then he makes calls, gets the knock on the door from AMS, reportedly goes out to see what's going on or whatever, ... the cops show up right away and start searching, then massive searching starts with neighbours, and after neighbour LH's social media announcement.. including K9s. I guess if PS did this, then little W was already dead under the steel, for no reason whatsoever, because even if unconscious, surely he would've woken up at some point and started bawling..
PS also had company coming, so it's not like he could've gone and done something with him later when all the searchers and cops were everywhere and the inlaws were visiting? I believe the cops were all over the street for several days? Also he is likely one of the few people who did have his vehicle(s?) forensically examined, and nothing, so if he did somehow take him out later without being seen or heard, where did he take him if not by car, and how did he not get seen or heard and how did the K9s miss the scents?