Hiya Carl and Jupiter,
I am the one who suggested a gender reassignment might have occurred. I was only half joking: it would in fact be one way to account for a woman who suddenly sprung into existence as an adult, with no discernable past. A new identity might have been desired in that case. I put it forth as one possible explanation, not the only one or even the most likely one.
It is far from the most outlandish theory ever posited on Websleuths.
She is tall, and to put it charitably, has very large feet for a woman in one of her pix, though the much younger pic of FLEK, in which she looks quite feminine, WOULD seem to make a sex change less likely. True that it does not change DNA, but was that issue ever addressed? It's not like it would be the first thing one looks for when doing testing. And was DNA testing ever done at all? Hmmmm....
Anyone know how fingerprint searches are done when you do have a body - do they only run a sort on WOMEN if you assume it's a woman? Here's where I am going with this: maybe her prints ARE in the system - as a man. And possibly they weren't checked.