My point wasn't that he had been inside. My points were:
- any adult can guess the layout of that house, including one who spent his time wandering the neighborhood
- police routinely look for suspects who were there, but aren't anymore. Disappearance from the scene is a frequent clue
- it would be not only feasible for someone to enter a house without disturbing the occupants, it's been done - and it would be much easier to pick up a child and leave than threaten Elizabeth Smart, sleeping in a room with a sister, to leave. Ditto Madeline McCann - she was in a room full of other kids, who didn't awake.