I'm one who does not believe the family was involved in any way, shape, or form, but I do find the pineapple...odd? One of the explanations that makes the most sense to me is that JBR actually ate it much earlier in the day (before they left for the party). Apparently one of the medical examiners feels it could have been eaten that early. The other medical examiner felt it was eaten shortly before death which is weird to me. Did she sneak down and eat pineapple and come across a person in the house who killed her? That seems like a stretch especially if that person was just there to rob the place and next thing you know there is this whole "kidnapping" thing. Did the murderer wake her up, take her downstairs and feed her, and then kill her? Strange!
Now, if she ate it at 4pm that afternoon before the party, it makes total sense.
There are so many "experts" who completely disagree with one another. "It's completely impossible for the pineapple to have been eaten that early." "It absolutely could have been eaten that early in the day." Okay then.