The whole case is very odd, lots of detail missing in the BBC report about events before he went missing, his RAF career and his personal life.
The RAF were very quiet in the weeks following his disappearance, not what you would normally expect.
The family's behaviour has also been quite odd as well, admittedly I would probably behave differently if it was one of my siblings however some of the things coming from the family were unusual- especially the mother (who is/was) a serving police officer and would know Police investigation processes.
Note the inquest is adjourned until February so this is not the final word.