I don't think probability matters, though I agree that it is unlikely, as people (homeless etc.) have indeed lived in storage units. I posted a long post earlier saying that the kids were clearly too active to have been so positioned; but I don't think LE was too squeamish to say whatever the polite LE version of "we're looking for a corpse" is instead, if they thought they were in fact looking for dead bodies.
Justin said "he" and "him", and the parent of TR's friend is a mother, IMO.
Incredibly so. Like, 2 or so days apart. Check the timeline at the beginning of this thread for the particulars.