I agree with you 100%. I was trying to say that the family/parents who KNEW the correct arrival date was Thursday, and not Friday as reported by the news, did not care about setting it straight or they would have DONE something to set it straight and they did not. I am confident that they read all the articles stating they got there on Friday, yet they did not make an effort to get the correct information out to the public. Perhaps, LE knew from the get-go, I have no idea, but the public sure didn't. A correct timeline, released to the public, is crucial when a child has gone missing, especially if there is any chance he was abducted. MOO.
ETA: I supposed it is possible that during the early parts of the investigation that LE did not want anyone to know that they were there Thursday night and told DK and JM not to reveal that information - maybe it was intentionally left out as part of a strategy on their part in order to aid their investigation (sometimes police will intentionally omit crucial details that only a suspect would know). Probably far-fetched, but just an idea...