Gotta know whoever said that fact - there have to be more who saw her that day but the longer we wait for an official "investigation" to be made public - and lead to court action - the less chance that any of those who saw her that night (if this is a true factoid) would be available to testify to that fact in court.
Course if that's a fact, it doesn't mesh with the emphasis from Moe, from KE, from Stern that Anna had been so sick all that week....
Someone said, and i think it was the Jackie Hatten interview, that she spoke with Anna by phone from the Bahamas and Anna told her she wasn't allowed to leave her room OR couldn't leave her room and was very upset about it. It was one of the very earliest interviews. Maybe the day of or after she died.