possibly it is a hoax or, better put, a cover-up for the tb outbreak. i would think so as well, as there are not many pictures (and if, always the same) of this girl to be found on the internet.
but: if it is a hoax, it does not explain this fb page. it is just plain unnecessary to put it up at all - if the case is a hoax.

so i go with: this girl was murdered. we just don´t know yet why and by whom.