I do believe the estate documents are significant, but not from a crime investigation point of view. It is my understanding it is the family, not the Police, who want the documents hidden. In that case I would think the family is just acting like 'rich people' who want to avoid embarrassment of some type or other.
On the other hand, if there is family involvement in deaths, and the estate documents suggest some discord or animosity in the family, that also could be a motivation for secrecy.
In their attempts at secrecy, the family may actually drawing more attention to themselves.
On the other hand, if there is family involvement in deaths, and the estate documents suggest some discord or animosity in the family, that also could be a motivation for secrecy.
In their attempts at secrecy, the family may actually drawing more attention to themselves.