There is a famous insurance fraud case in South Africa based on similar circumstances. A man was supposedly eaten alive by crocodiles in June, which is mid-winter. This was 'witnessed' by 2 other holiday makers. Investigators became suspicious when they traced phone calls between the 3 parties...
What I am puzzled about is why Denise and Brian continue to live in the same house as Denise and Mike did. With the whole town talking about them for 10 years, one would have thought they would have moved by now. Given that Denise had so much insurance money paid out, why didn’t she move...