A very sad assumption to add to this topic is, IF the BRS was not activated, one could assume that the young chap felt he could sort it out rather than face the consequences. I don't believe he was the owner of this very expensive aircraft. Given the circumstances of the illegal flight, insurance would not have paid up. His parents would have happily taken the financial loss for the love of their son, of course they are now faced with both losses.
This is not just about loss of control in IMC, as with most crashes, it contains a multitude of factors; including non-aviation related influences.
If you have BRS, at least have a set rule as to when you will use it.