I agree that the whole thing is looking to be fabricated and I don't see the cadaver dogs "indicating" overriding the fact that no remains have been found. One person has claimed that multiple family members were involved/witnesses, but only she remembers the events, and the others deny it.
I'm not seeing any information about these dogs and more importantly, the qualified? handler/training. Is there another source that gives this information, if you know? There is a mention that the same handler brought another dog to the location. Is there one handler saying that 3 of his/her dogs "indicated"?