Just as an aside.. when I am traveling/on vacation, spending leisure time perhaps with others (in my fam or otherwise), I tend to do things which are not part of my normal day-to-day, regular-life activities while NOT on vacation/traveling. I like some crosswords too, but I can tend to get hooked on Sudoku.. but during 'normal life', I don't ever, and wouldn't ever, spend the time to do it. Ever. But my family members, if they found a Sudoku thingy after I got murdered, might assume that I must've done it in the morning, since that's when I would've done it while with them on vacation or whatever.
The kids can say what they know from the past, or what they've noticed recently, but I don't think we can depend 100% that the normal schedule may not have changed once in awhile, or ever. It's a clue for sure, just like the unmade bed, the toppled lampshade, and RD being found in his bathrobe. I wonder if the newspaper delivery person (I wonder if the newspaper *was* delivered, or did they pick it up daily from somewhere?) was interviewed to see when exactly it was delivered (if it was), and if they noticed anything at all?
jmo.