Why on earth people are trashing Peter Faulding I have no idea.
He offered his services for free after a few days of the police not finding Nicola in the river probably hoping to bring some closure for her family. Why the police didn't immediately accept his offer knowing his expertise and the higher spec equipment he had is not clear. Obviously they then did accept after further days of not finding her. He has done his search, nothing found and it is his opinion that she's not in the river which he is qualified to give as a FORENSIC underwater search team leader.
Obviously he's spoken to the press as they have approached him for his views, being an expert in this field and all, and the nation waiting with bated breath for this mystery to be solved.
I read up on another search his team worked on a few years ago, a young lad, where the river was much deeper and he was found in two days. Thankfully sparing his family more long days of agony before getting him back and being able to start grieving for him. He did that for free too.
I'm sure he wanted to go the same for Nicola's family.