I agree as a parent it would be devastating to have your hopes raised but then dashed, but it's hard to be overly critical if the searchers were doing their best to keep the parents informed in real time. Also, we don't necessarily know exactly what they were told. It could have been anything from, `She's alive' or `We've found her, haven't been able to get to her yet but we think she may be alive'. Big difference, but the media would just focus on them being initially told she was alive and then criticise the mistake.