I'm not trying to belabor the point, but a newsguy saying that the cops say that the other kids says his brother flew away in a balloon doesn't equate to the parents calling that into the authorities, much less doing that as a hoax.
Sheriff said sibling claiming Falcon was in a box attached to the balloon was interviewed multiple times and his story remained consistant.
Sheriff also said that it was not uncommon for missing children to hide once they learn they are missing because they are afraid they'll get in trouble.