When the death of such a young public personality is described simply as having occurred "of natural causes," people will be curious/puzzled, and some people will assume that there's something to hide.

I'm not saying it's right, or that celebrities' families don't have a right to privacy, but when the public has reason to suspect that some facts are being held back, some will suspect the worst, some will say so out load, and distateful reactions become more likely to find their way into print because they would be seen as catering to a potential audience.