In my opinion he's acted completely unprofessionally, criticised and belittled the efforts off the police search team without knowing the full facts, undermined the investigation and personally caused some of the speculation.
I really don't want to hear about his 'shoe on the riverbank' or 'howling dog' cases, or about his 20 years of expertness again. Nor about his 'top of the range', really expensive and better than anyone else's £55k sonar.
He sounds like a golf-club bore boring on about his new job and car.
Just my opinion.