I just watched a show on this on the history channel last night. They suggested she was murdered in the pool house then the body was moved into the guest house and arranged in the "suicide" scenario in which she was discovered. They said there was a phone conversation where she said she was "going to blow the lid off the whole thing" Next thing you know Bobby Kennedy shows up, leaves ,shortly after cops show up and Kennedy is seen accross the country the next day. Of course I dont remember all the details the show was on late. Im sure you could find it it was on the history channel. Basicly they were saying RFK killed her to keep her from talking about im not sure what.