The community of Carbis Bay is still coming to terms with the grim discovery at the bungalow of Jonathan and Derisa Trenchard earlier this month.
One of their three sons Joel, who is thirteen, has just returned to St. Ives School, his two older brothers are former pupils.
ITV News Westcountry's Steve Hardy has the full report.
More top news
Could this 10-year-old be Bristol City FC's lucky charm? The club are hoping Jaden Neale will bring their team a win against Manchester City
The Force is pledging to make local policing accessible again by providing a dedicated, named PCSO in every neighbourhood.
Read our Political Correspondent David Wood's blog about the growing number of Conservative MPs publicly calling for more NHS investment.