Let's add a "friend" of one of the sons that was found dead on the side of the road in 2015 (the sons were "persons of interest"). Then the housekeeper died on the property in a slip-n-fall that cost one of the sons a $500k judgement that was subsequently sealed.
Also heard (can't find the article now) that there was a sheriff's deputy killed 2014/2015 that may have been investigating the family...